Maybe add the flag|vouch to the comments for those threads? Not entirely sure how it works (or if its possible), but it seems to work pretty well. I am guessing there is a filter for bad actors, even if not, the few that would be affected would maybe end up with positive comments from long aged accounts.
Thats a lot of maybes, but my impression of the flag|vouch feature is as a first step community moderation and guessing it works well? The job thread being jobs targeting the community, I would think it would as well, or at a minimum help.
