This is a dangerous topic...I can just see men taking matters into their own hands over this...
[rimshot]
Gamete so many interesting people in the sperm donor crowd...although I'm sure a lot of them are your average jerkoffs, I bet most of them pull their own weight.
Any gay man who thinks he's going to donate is having delusions of glandeur (I love recycling puns). There's a vas defrens between a straight man and a gay man donating. For one thing, I don't see a straight man becoming the joke of so many butts.
Yanking the tail of reality, and giving a browns eye view to genetic claims, the conclusion to sack the breedership ability of a protected species is a no brainer.
Spermisitcally speaking, of course. :-)