Why do it secretly? If I don't like someone then I don't see any point pretending otherwise it just makes the situation worse.
I have 50, most of which I talk/see on a semi regular basis (I moved interstate a few years ago so it's my only real way of staying in contact with some). I could easily get rid of some though (and think I probably should).
Edit: this reminded me to do a clean up so 4 gone just like that... maybe more soon to come.