I can see this feature being misused. Way easier when it's a post that bumps an old thread, because then we can just delete the post and the thread will go back where it was.
Also, this feature wasn't really ever enabled, it just happened one day that it somehow got enabled, I noticed it after few bumps, and that's why I removed it again.
At least that's how I think it was...
And what Geno said.