you can't D:
Well, this is what I think. I think that if it was a RANDOM guy you met on facebook or something, I didn't talk to him and I would block him. If it was a guy that you met 2 days ago, still don't do it. But, if it was like 2 weeks gone by, then I would.
Blocking of facebook is not easy if you don't have an application level firewall( untangle linux box, or "WFilter Enterprise" like software). However, there are several solutions you can try: 1. Block facebook in dns server with "opendns". 2. Block facebook server ip address ranges. 3. Because facebook also supports https access, you also need to block https login of facebook. You can use WFilter's "https black/white list" to block it.
You cant
yes
Actually, she does.
You can't.
how to block messages of unknown person on facebook
search their name with a different facebook account.
Yes
Yes
No
Yes you can