I think if the last post is a bump and they are just saying bump, the forum post shouldn't go thru. I follow a lot of topics on my watch list and sometimes I see just the same thing a wall of bumps. I think bumping should be detected and discard that post. I get it one bump is cool some people miss it, but week after week if people are just bumping and no one is interested clearly this shouldn't be happening.
1 bump per day is the allowed quota. If they bump multiple times a day, please report the post.