I stalk them back.

When ever someone tries that garbage copy and retain their email ect. then block them. If they pop up under another screen name or harass you on another site; that is when you get serious and call the non-emergency number of the local police department and start a file that I guarantee you they take serious.

DO NOT respond to a stalker. Don't keep chatting about it on public media because these whackos take that as encouragement and it can hurt the efforts to get intervention. Sometimes they will actually use your complaints and or attempts to scare them away as grounds to harass you legally with restraining orders.

I'm amazed several of you say they have none. I wonder if my country attracts them I get 9 out of 10 messages or 99 out of 100 !! Not saying all in a day but really. Admitting most mingle2 real people seem to be in the US ... And most stalker's too or pretend to be
Note: what I mean by stalker is anyone really not what they pretend to be , in general I don't reply if it seems obvious , but at times you feel paranoid and try one answer , if no one sends second message or if second message totally off track you got the answer, unfortunately same answer for most or about all