A serious and real problem, I agree. Considering it is a social site, making those follows time-limited (or prone to expire without opting in) would level the playing field quite a bit. Frankly, if you had me set to "ignore" but had the tags we mutually found interesting set to "follow" it would cease to be an issue. As it is, I'm tempted to start posting things with the tag #stuffkleinbl00thinksyoushouldignore for things that I'd really rather have a lesser audience for but it's probably too long a hashtag.I think that's partially true, but misses the fact that your okay posts are neon skylights and my okay posts are fliers in the backs of coffee shops.
Hmm. I think that would be extremely effective as long as you didn't mess up the spelling.