one day you will get to the place where you figure out it just is not worth the effort unless this person is a good friend. it's just so much easier to let clueless people keep on being clueless. People tell me downright dumb shit all the time and I just nod knowing if I don't respond they will waste less of my time. really I don't understand what you are doing even reading what that guy posts when you know it's garbage. facebook is another story, i was on it for about a month, it's just awful. I guess you could just set it so you ignore most everyone but then what's the point to begin with. Most people don't take the time to post quality content on the internet, especially on something like facebook. we have a very limited time on this earth. If I'm going to read something on the internet I want to drastically increase the percentage of decent thoughful content. That said I don't spend a lot of time on these forums, but there's always that rare nugget of goodness.
So ignore this guy unless you are the type who enjoys meaningless confrontation.