Nok:
Whew, two cents: limiting blocking is probably a BAD pr decision at the least, bordering on being actively inhumane. And probably bad business in other ways, since people aren't likely to get a premium account just to block profiles that harass them, they'll just leave the site.
And if it's really community that you worried about, in addition to unlimited blocks keeping people here better, you could just implement a block renewal protocol of some kind, perhaps a list of profiles you've blocked or unblocked, with blocks expiring after a year and requiring renewal in the form of rechecking a box in that list. Or something.
Munchies:
Not sure about the blocking renewal thing. But I agree with everything else you're saying.
Yah, ditto, was just trying to think of a compromise they could accept.
