The problem with stopping being argumentative is it becomes nothing but an echo chamber of "This", "What he/she said", and "Me too". Argument begs debate and explanation and other topics spring from that.
In my opinion, arguments are great, just so long as they don't degenerate to the point they end up in Flame and Burn to die in a hail of "STFU n00b!", "No U", and random kitty macros... which I admit I do like. The kitties, I mean.