I Have a Friend Request From Who?

I have noticed a lot lately I get friends requests on Facebook from friends of friends. I will see a name come through. I will look at the picture. I will have NO clue who it is. So I hover over the accept button wondering if there some way I actually do know this person...whether online or in the real world. Then I see the friends in common link. There will be one or two friends in common. So my conclusion is that someone sees my profile from a friends page and decides I look nice enough so they add me. I admit, I frequently ignore those requests. I have had this happen and then been bombarded with requests to join their Mob Wars. I then promptly deleted all of those people. I am a friendly girl. I like to chat. But I am sorry. I don't want to join your Mob Wars.