If you don’t like a rule or aspect, of play, or theme mentioned by the owner in their world thread, then don’t join. That should be your only response to things you don’t like about other people’s worlds.
Do NOT post to express your dislike or disapproval. They made the world for themselves, and others who wish to play on such a world. The fact that it’s not aimed at you is not their problem, so don’t try to make it their problem.
If you feel a world feature is inappropriate, flag the thread to me, and I will consider your points. Otherwise, join or don’t, but don’t criticise.