The SEND button... it's just so final.
Have you ever had the feeling of wishing you never said that? Luckily, I haven't, but because of taking night-classes in "Empathy", I can understand the problem. Where are all those obligatory warnings that anything we say can be used in evidence? Why aren't we advised that we are responsible for the actions of our own mouths? Unless you have White-House privileges, things put to the Internet can hang around for a very long time.
But on a positive note, I have observed a pleasant degree of civility in most contributions.