I do like the idea of letting the person who creates the tournaments to be able to kick certain people out of the tournament.

This could come in handy when:

1. A pawn or Knight enters and does not have enough spots (like when the max players are set to 4 or 5 - it could mean the tournament will not start unless they are removed)

2. Also when someone somehow gets into a tournament and their rating is outside of the "scope".

...........
But on the other hand, I can see this being abused and causing some people to get mad when they are removed from a tournament. Something to think about though.