Awkward Moments

In relation to facebook awkwardness, when someone you unfriended during a facebook purge adds you again a few months/years later and you're like 'Did they realise I unfriended them and want to be friends with me so much they forgave my rejection and added me again or did they not give enough of a shit about me to notice I unfriended them and only added me again for superficial/insincere reasons?'

I either wouldn't add them back or I would add them back but not let them see my wall (and hopefully you can still see theirs so you realise what losers they are).