A troll is a troll is a troll.
It doesn't matter who you support, so long as you contribute positively to a thread.
Frankly, some of the worst recent trolling here has been BHA against BHA. The trolling of HBB (regardless of whether you thought he was a prat or not) was disgraceful, but seemed to go unchallenged by mods and others. I'm not surprised he finally flounced, as by the end every time he came on, the usual suspects were queuing up to have a pop.
Not even the most tedious away fan has had endure anything similar in my time on here.
If they want to post their version of the truth, then let them so long as they keep to the rules of the board like everyone else. It isn't as if we are overrun with them.
Without wanting to cause Bozza any problems, the poster you mention didn't "flounce" because of being trolled (he clearly reveled in that). He left the forum because he was attempting to start a career in politics and didn't want his internet persona to affect it. To the point where he attempted to get Bozza in trouble because said poster was so embarrassed about his posting history on here.
I'm not disagreeing with the gist of your post but we shouldn't rewrite what actually happened.