Haha, some people definitely 'lose their shit' over it, when they should probably just chill.

It's not against rules to 'bump' an old topic, I think a lot of people just find it annoying when someone goes and comments on numerous old topics without adding anything to an otherwise finished discussion. But commenting on old topics is not an issue in itself, but just bumping a bunch of random ones without adding anything can be annoying to some who have been following several topics, and then see a bunch of old ones bumped back up to the top for no apparent reason. It can also be annoying when someone starts a new topic on a discussion that's already in existence. In most cases, it would make more sense to just find that topic and comment on it rather than start a new topic on the same subject. We can also merge discussions or break comments off to new topics when really needed, but in general, I'd say don't randomly bump an old topic from years ago only to add 'interesting' or something, but mainly if you have something on-topic that would likely lead to further discussion.