Numerous apps have protocol for users whom violate their policies or terms of good use. These violations may include money that is requesting spam or solicitations of other sorts, fake pages, or giving harassing or unpleasant communications. If some of these or any other violations happen, block the user and report them to the software.
Before agreeing to meet up with in person, ensure it really is something that you are quite ready to do. Before you are ready, pay attention to that feeling and do what makes you comfortable if you are feeling pressured to meet.