Completely agree. That’s expensive and they won’t do it, though. If they do, then awesome.
Captcha with 15 minutes to respond is still a bit intrusive, but not AS intrusive as a captcha that needs to be done right away.
Another cool way to do it is give some trusted members of the community a “Player Mod” title with power to start a server-wide vote to kick.
Obviously, it can be abused if given to a wrong person. That’s the only downside. I mean, it would still be hard to abuse it, because the whole server CAN (Not needed to) vote, when he starts the vote.
So In order to abuse it, he would actually have to control the whole community in order to do it. Which is unlikely.