This always comes up when we use facebook..?

[Anastasia]

I have never had spam followers before (or any followers for that matter) but according to my sketchy knowledge of Facebook, you could go to each persons page and block them so they can no longer see your account or timeline, I realise that there is a fail few people doing this and it might take a while, but the only other option is that you edit your account settings so that only you and your friends (or maybe friends of friends) can see your time line and send you friend requests
if you did want to edit your account settings, you could got to the cog icon (tools I think) in the top right hand corner of your account and play around with "privacy settings" I realise this is fairly vague information but my knowledge of Facebook is scarce and I hope it helps