can I remove members from my server who are in another server?

I am having a problem where members from another (very unsavory) server keep joining mine to either lurk or post hateful comments, videos, images, etc. and I want to know if there's any way to remove any members of that server from my own server and ban anyone in the other server from my own.

edit: We have already reported the server, just waiting on a response, but I'd like to clear my server of any members from there regardless