If I think a post is a load of crap or someone is being a knob, I just skip over it. I don't understand why people get upset, well, unless they were being personally attacked but then I just give it back and move on.
Foo
I agree with Foo, surely there is more important things in your life than what is said on a forum. If I get an individual who has to be negative to one of my posts then I might try to explain what I was about, but if the attack persists then I just move on. If I get disillusioned about this forum for some reason, I just give it a miss for a few days and usually put more time into projects in the shed.
Having said that though, I find this forum a great resource with valuable input into one of the worlds that I enjoy immensely, camping and touring. Members will come and go for all sorts of reasons, but I think the person who said that if you can't say something nice (or at least informative), move along and kick the cat instead of venting your frustrations out on someone who is just trying to explain their views of the world (and that is their right to hold).
Just my opinion.