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Stalking Your Friends with Facebook Messenger

medium.com

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Re: Stalking Your Friends with Facebook Messenger

#111
> the message locations have more than 5 decimal places of precision, making it possible to pinpoint the sender’s location to less than a meter.

Precision is not the same as accuracy. Although the reported values may have 5 decimal places of precision, I find my location is often a bit off.

Re: Stalking Your Friends with Facebook Messenger

#112

Earlier quoted context omitted.

I've been doing that since I found out they were requiring access to text messages. One year later and I have zero regrets.

It's ridiculous how many completely irrelevant permissions they demand! Facebook's laundry list of permissions is perhaps the best example of how Android's permission system is completely broken.

I agree, but I'm not married enough to the native client to be upset about it when there's a perfectly good mobile site waiting for me.

If they tank their native site, well, then they won't get to harvest any more data from me.

Re: Stalking Your Friends with Facebook Messenger

#114
post #4

I'm not sure what value add this serves as an opt-out solution rather than opt-in. For people who have a strong desire to show their location, sure. But what possible reason could Facebook have to make this readily accessible to anyone you chat with on an opt-out only basis?

The banality of evil: they got so used to tracking the exact location of their users at all times, and sharing that information with advertisers, that they didn't realise that it might not be a good idea to systematically leak it to other people.

Oh, I'm sure they knew what they were doing. They just don't care if it's a good idea for you. It's a great idea for them and their partners.

Re: Stalking Your Friends with Facebook Messenger

#115

I use this facebook app now: http://i.imgur.com/Iyd43n6.png (Android) It's either a well written FB app, or a no-permissions jail around Facebook's own hybrid-app/mobile-site. GPS no longer turns on, and messaging works for me.

There's also 'Tinfoil for Facebook' https://play.google.com/store/apps/details?id=com.danvelazco... which is opensource https://github.com/velazcod/Tinfoil-Facebook

Someone used that code to make Tinfoil for Twitter as well https://play.google.com/store/apps/details?id=com.mill_e.twi...

Re: Stalking Your Friends with Facebook Messenger

#117
post #92
post #70

The joy of mobile apps, pulling as much permissions as possible during install, and abusing of them whenever you run them. When I see this the debate between native apps and web apps is over, and it does not end with native apps winning.

the joy of Android Mobile apps. I dislike Apple for many reasons, but the permission model on iOS is a lot saner than on Android.

You still end up giving away your privacy just the same. I'm not sure how that's different.

Re: Stalking Your Friends with Facebook Messenger

#118
A minor nit-pick, most GPS chips will happily give out a position as a best-effort.

The actual accuracy of the measurement is given by the dilution of position (DOP), which does not appear to be in the data shown in the blog post.

This would undermine their ability to pin-point their location to within a meter, as the DOP could be very high; especially in areas with lots of tall buildings or other problematic environments.

From the comparisons, it looks like the author's GPS is getting a very low DOP (i.e. a good, clean signal from a constellation of >= 5 GPS satellites).

Either way -- still glad I don't use FaceBook, and an interesting find!

Re: Stalking Your Friends with Facebook Messenger

#119

Hmm, where do you see this? I don't use Messenger, but many of my friends do, and I've never seen this. Is it only for Messenger-to-Messenger chats?

I couldn't get a screenshot with the map popped-up, but if you go to "see all" on the web, you can get a full-screen view with these little location pins. Hovering over them gives you a map.

http://imgur.com/vloxbkI

Re: Stalking Your Friends with Facebook Messenger

#120
You can also see if your friends are currently active using their browser, mobile device, or are inactive. These data could be used to infer usage rates over time. It might not sound that intrusive, but the tone is very different if you were to graph these same data per friend over, e.g., a month.
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