Id only say remove teammates getting the kill on you with arrows or bombs so it's only used as a tower technique to make sure your members are always on full hp. You shouldn't be given the kill for something you didn't even do.

When I pk (barely) it's usually towards a goal, if someone suicides then it just backfires onto them since I'll just be pking longer until I get my goal. Pkers should have that mindset coming into a tower to pk, or just plain and simple - get good?