These people should not be punished with negative karma. If anything, we should be awarding karma for those people who make meetup posts.
Karma shouldn't be about punishing or rewarding writers, it should be about telling potential readers how helpful you think a post/comment is.
shouldn't
but is for some people, unfortunately
(I advocate more nuanced voting categories to solve this)
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.