Hi. As a real estate agent, I cannot comment on such issues by law and would have to refer you to the police precincts of the stations you would like to know about or the transit authority for an inquiry about subway safety.
As a parent of an 18 year old and a 22 year old, I can tell you anecdotally that we live in the Slope and my kids are out late and travel on the F line all the time and never had a problem. I raised them here and we personally wouldn't live anywhere else. I have sold here and my past clients love it here.