If an individual has grown completely tired of any of the other front ends because of harassment, then they can spend the vast majority of their time on PAlnet and not be bothered by the Steemian, or Leoians or any of the other front end groups. If you are on PALnet you will not see comments from non-palnet users in you replies box. Like wise you will not see comments you made to non-palnet post in your comment box.

THIS. Separate tribes. Separate comments. The comments aren't "disappearing". It's an intended feature IMO.