I'm back from a week at my mom's house and now I'm getting ads for her toothpaste brand, the brand I've been putting in my mouth for a week. We never talked about this brand or googled it or anything like that. As a privacy tech worker, let me explain why this is happening. 🧵
2,488
102,595
296,263
First of all, your social media apps are not listening to you. This is a conspiracy theory. It's been debunked over and over again. But frankly they don't need to because everything else you give them unthinkingly is way cheaper and way more powerful.
188
2,995
33,292
Your apps collect a ton of data from your phone. Your unique device ID. Your location. Your demographics. Weknowdis. Data aggregators pay to pull in data from EVERYWHERE. When I use my discount card at the grocery store? Every purchase? That's a dataset for sale.
36
1,751
23,651
GIF
They can match my Harris Teeter purchases to my Twitter account because I gave both those companies my email address and phone number and I agreed to all that data-sharing when I accepted those terms of service and the privacy policy.
27
1,448
23,356
Here's where it gets truly nuts, though. If my phone is regularly in the same GPS location as another phone, they take note of that. They start reconstructing the web of people I'm in regular contact with.
99
3,939
37,866
The advertisers can cross-reference my interests and browsing history and purchase history to those around me. It starts showing ME different ads based on the people AROUND me. Family. Friends. Coworkers.
86
3,068
34,358
It will serve me ads for things I DON'T WANT, but it knows someone I'm in regular contact with might want. To subliminally get me to start a conversation about, I don't know, fucking toothpaste. It never needed to listen to me for this. It's just comparing aggregated metadata.
71
2,063
33,007
The other thing is, this is just out there in the open. Tons of people report on this. It's just, nobody cares. We have decided our privacy just isn't worth it. It's a losing battle. We've already given away too much of ourselves. gimletmedia.com/shows/reply-…
72
2,745
27,061
"We spotted a senior official at the Department of Defense walking through the Women’s March ... His wife was also on the mall that day, something we discovered after tracking him to his home in Virginia." nytimes.com/interactive/2019…
16
1,456
16,397
So. They know my mom's toothpaste. They know I was at my mom's. They know my Twitter. Now I get Twitter ads for mom's toothpaste. Your data isn't just about you. It's about how it can be used against every person you know, and people you don't. To shape behavior unconsciously.

3:54 AM · May 25, 2021

126
4,435
33,837
Apple's latest updates let you block apps' tracking and Facebook is MAD. They're BEGGING you to just press accept and go back to business as usual. Block the fuck out of every app's ads. It's not just about you: your data reshapes the internet. vox.com/recode/22254815/face…
167
7,896
37,011
The internet is never going to be the wacky place it was when I had a Livejournal and people shared protean gifs in the form of YTMNDs. Big business has come to suck the joy (and your dollars) out of it. At least make it hard for them. 🪡
214
2,584
27,168
Oh, this post is my Twitter high score. If you like D&D consider sticking around, my account is 85% tabletop RPG development and 15% leftist politics.
Soon I’m starting playtesting on my first adventure I intend to publish. It’s about a diamond cartel that’s cornered the market on resurrection. Here’s the first piece of art I’ve commissioned, by Andrew Phan. His portfolio is here: artstation.com/droodesigns
Show this thread
203
315
10,920
Plug #2: my brother @josephoforb landed a book deal for his Hollywood satire about a failed actor in a superspy franchise who is framed for murder. It is HILARIOUS. James Bond meets Avengers meets Knives Out. Preorder it. It comes out in July. amazon.com/Jove-Brand-Near-D…
180
337
7,146
Replying to @RobertGReeve
Yes because that secondary target audience matters. If I know my mom uses that toothpaste and it pops up- I’ll lightly bring it up to my mom. And oh look, she probably needs to refill so let’s buy. Lol It’s nuts.
0
1
10
Replying to @RobertGReeve
So, if your Mom had a secret vice, say playing the poker machines, you could start getting advertising that potentially breached her privacy and/or alerted you to her behaviour? Ugh
1
0
21
Yes, people started getting baby ads after visiting my gf and me. We hadn't told them about her pregnancy.
3
7
36
I had a SINGLE facebook conversation through messenger with a friend about her daughter's weird toy fad "shopkins" Anthropomorphic groceries (kinda weird toy to market to little girls tbh). That was five years ago and i still occasionally get ads for them.
0
1
8
Replying to @RobertGReeve
Crazy part of this is, I bought a new washing machine. Then I get hundreds of adds of washing machines. How many washing machines do we need I wonder? I leave my phone in the washing machine when I go out now..
1
1
27
You’re unable to view this Tweet because this account owner limits who can view their Tweets.