Well because most the guys who posted them statements have zero intentions of actually going thru with it. It is always so much easier to type "I'm going to whoop your azz" then to say it to ones face, or at least to someones face over the age of 12. Because talking [bleep] in person is dangerous. LOL.
I know if I was intending on having a heart to heart with someone, I surly wouldn't post it all over the web. But, I'm not trying to get my name at the top of any list with a gold star next to it either with the "cool guys"

But you are 100% right inland, saying them kind of comments in an open forum is not too dang bright. Again, these folks who made them comments would never go thru with it, so they think, "well I sure can sound all big and bad, and impress the cool guys on here". But they never think, that if some unforeseen assault took place on him or his wife, well.....................

If this guy has went and ripped off so many folks too, it could actually happen.
But I guess this doesn't sink in to folks with room temp IQ.