We usually call those things "posts".
He said point of that, not what is that, meaning "What the he3ll was the point in posting this useless stuff?"
OMFG you have read 671 of my posts?!? You must be a big fan of me! :D
Or, he may have just, you know, looked in your profile.
You should check your IQ, I think it's lowering! :O
Ooh, nice one there!