Whats the most cringeworthy thing youve said/done on the internet?

I write for pro wrestling magazines and sites and, when I was an employee of WCW (a wrestling promotion), I wrote an email to the publisher of the magazine I edited about what a jerk Eric Bishoff, both the publisher's (my direct boss) and my main boss. I said things about him that were not at all nice but I was mad and he WAS a jerk. For some reason, after I wrote the letter, I pushed a button to start to fill in the name and it filled in and I sent it. As it was sending, I saw it going to....Eric Bischoff, the guy I just trashed. I must have had him on my mind and I dunno. I panicked but there was no going back. I thought my job was done. I expected to be fired at any moment. I saw him a few days later (I was shaking in my boots) and he said he got my letter but...for some reason it was all jumbled up and could I resend or just tell him what I wanted. WHEW! I honestly don't know if he just said that to avoid a blow up (I was doing a good job) or if it really did get jumbled but I was MUCH more careful after that.