I think personal attack is a difficult one. There are many of us, myself included, like to wind each other up, shout obsceneties and be ass-hats. The love is really felt on the CoD2 servers and even on CoD4 I hop in and mess around. But that's because we know each other and its just mates having fun.
On the other hand, some people don't see it as fun, and they will take it personally which is what I think Apollo had done and thus went to an admin. We all get heated up and we all say things in the moment, I know I have. Maybe its about dialing it back a bit. Cuss your mates by all means but just be mindful that something you might say could be taken well out of context by someone else. 80% of speech is body language and all of that, including connotations and ways of speaking is thrown out the door in text so the meaning, joking or otherwise, is lost because other users don't know how it is you are saying it.
I agree with the ruling of "don't like it, don't comment." Just leave sleeping dogs lie - you'll just open up a can of worms.
And on a final note, just because someone is better than you, it doesn't make them a hacker.