"You allow us to distribute that content on twitpic.com and our affiliated partners," the post reminded users.
The pictures weren't explicit; they just reminded users of something they would rather forget, or made them look stupid.
And it has reminded users in the last few weeks to review their privacy settings, to better control if and how their information on Facebook can be found.
Twitter also reminded users of a relatively new feature allowing them to report individual tweets from its iPhone app, and says that it plans to make the feature available on Android and on desktops.
Twitch has reminded users via a series of Tweets that the live streaming service is for game footage only and can you please put that away no one wants to see it.
Alongside pictures of a server made out of toy building blocks and Google's first office "also known as Larry and Sergey's Stanford dorm rooms", the company has also reminded users of its first homepage, which it points out "worked better than it looked".
