I get a lot of spam and unknown friend requests from weird people. This makes me to keep blocking all of such accounts on daily basis. I usually block at least 6 to 10 different accounts every day on Facebook. I don't know what they are looking for with my account.
I used to block so many scammers that I got tired of using that feature. I got to the point I was spending more time blocking them from my groups than the actual time i used to post on those groups.