We allow it on our large subreddits on reddit. What we do is use a bot to filter repos that are less than 3 months old.

People who vibe code slop just want to share their thing and then abandon it. A limit like that or even 6 months will kill majority of this sort of low effort crap. Most of these people just let Claude or whatever sign the repo as well, another easy way to catch slop.

Developers that develop and only use AI as a tool build great products still as they review all their code.

A blanket ban is just going to make people be more sneaky.