It looks like you are killing flies instead of solving problems with elephants. Airdrops are the problem? So why there tons of airdrops on coins and tokens topics? Why don't you lock them and delete topics? Why hackers and abusers are still stealing personal data and selling it at specified topics of bitcointalk? Not saying about scammers and thiefs. But instead of that you just ban people which haven't any connection with their teams.
I won't use this account any further, and chose nickname to underline that. But in my honest opinion, its too rude of you to cast us out.
I do trash airdrops (the ones that incentivize posting) and ban the accounts that started them however just like with spammers, 10 more pop back up for every one I cleanup.
As for this being pointless, yeah, it kind of is, but it's one of the few measures I can take. Hell, even if I wanted to issue temp bans (though the permabans I dished out were for people with huge amounts of consistently garbage content alongside numerous participation in altcoin giveaways), I can't.