The reason people say things on the net that they wouldn't in real life is because they can hide behind a computer screen, feeling safe. However, put too many details about yourself online and you might not be as safe as you think...as demonstrated by that news story.
have offered to come and punch my lights out over the years. So far I've declined. One man suggested that I should "meet me at any location of your choosing, so we can settle this like real men".
When some people run out of rational argument they resort to abuse. Others (almost always males) take that a stage further and resort to violence as a solution to their problem. They're probably violent to their children, partners/wives, and dogs as well.
FE, I admire your tolerence. A lot of people (incuding me) would get wound up by that sort of stuff. Anyway, idiots who say things like "meet me so we can settle this" probably live hundreds of miles away anyway so it's just their way of venting their frustration. However in the heat of the moment I'd get a bit annoyed, so I think you're good for tolerating it.