Do آپ think I should un-fan all those people on this site who never fanned me back?

Honestly, like آپ said, that's up to you. Personally, I wouldn't but, like, that's because I'm too lazy to do so and don't really see the point. I don't really unfan people unless they persistently bother me.

Frankly I've always seen fanning as less of a friend thing and مزید of an, 'I like the content that آپ post/I share the same interests as you' type thing.

It depends on how آپ look at it. If آپ think of becoming someone's پرستار as "friending" them, then maybe آپ wouldn't want to remain their پرستار if they didn't reciprocate. But others (like myself) پرستار people because they like their contributions یا agree with some of the تبصرے they've made, so it doesn't matter if they don't پرستار me back یا even if they're no longer active here.

I personally wouldn't bother as it would take up time I don't care to use. If آپ feel strongly about removing someone who didn't پرستار آپ back then be my guest. It doesn't matter to me in the long run. So I am in a similar کشتی as Flicker.

It's up to you. I wouldn't do it as it's a waste of time and energy. I never understood the point یا value of adding as a پرستار here. It's not like دوستوں get extra access to privacy یا something. So, I just پرستار people if I have enough respect for them. And if someone adds me first, I usually add them back as an act of formality یا common courtesy. The whole add as a پرستار thing is nothing but a boost of ego here یا sense of security/insecurity. The blocking system is somewhat useless too.