Facebook air post
You post a comment on someone's status, then instantly regret it, delete it, but the notification still goes out, and now everyone's like 'What the hell did they say?'
You comment 'I'm so bored' and then delete it because you're actually excited but too lazy to say it.
You type 'This is the worst' and then delete it because you're just being a pain.
You write 'I love this' and then delete it because you're trying to be cool and failed.