Except he doesn't give two shits about trolls. He's worried about fanboys:
I can tolerate trolls as itâ(TM)s much easier to handle them. But fanboys are only there to harm you to diminish your work so that their world view doesnâ(TM)t break.
His point is that fanboys take as a given that their favorite software is perfect, and then engage in rabid apologetics to justify their position. In the face of change, they will quite literally invent reasons as to why their worldview is still correct.
Put another way: To someone who thinks "GNOME rocks => KDE sucks", nothing you can do to KDE will change their mind--it's still not GNOME, therefore it still sucks, and they'll create another justification as to why that is, forever and ever.
Since whatever purported problem isn't a real flaw, and fixing it won't make the fanboy happy, fretting over their posts is probably the worst thing you can do as a developer. And if listening to a fanboy can only do you harm, why let them derail all discussion and rob you of your chance to hear from those who can help you?
TL;DR--fanboys don't help discussion, and that's a problem if you depend on that discussion. It's not just butthurt.