The bathroom needs to be kept in tip-top condition. The perception of the area and message presented to the public is important and critical to its success. If you expect people to be there, you need to keep the space looking nice. It changes what they think of being there. There needs to be away to integrate all of the users and to make them all feel safe.
Security can only do so much.
If it develops a preponderance of one group over another, then safety becomes more of an issue. You have to introduce activities at the beginning.