Being a dick is subjective. He has the right to be self righteous, it's not against the rules, here is nothing wrong with that. He will be treated as he behaves.
If he wants a feature to block others so be it, it's his loss, no harm done. If there is a programmer who agrees with this then they are free to compile one and should be free to enable it on the site, it's not like you can stop them from enabling it externally via greasemonkey or something but I don't think that mods, developers, and contributors should be forced waste their time on that.