Hmm sorry to burst some bubbles but not all are good admins and group love in's won't help the ones that aren't improve their admin skills, same as all clans of a reasonable size F|A have some great admins, some good, some bad and some who just wear the tag.
Respect to those that do their best and as the op said there are never topics that give praise, only ones by nubs giving their reasons why x admin sucks balls, for example if I only read the complaints and believed them about young Yoyo I'd think he was some kind of major arse instead of who he really is.
Think a certain admin rocks, drop a pm to one of the clan leaders saying why, (sorry leader people you can hate me now) but it's always nice to hear when people are doing a good job and not just when your on the server with them.