too many follow links, indeed, not good. I would do the same what matt cuts said about rel=nofollow. As long as it has no relevant content, I would let it with follow link. For me, the content is everything (and learn always how to write effectively and useful for others) and from the best content, we have high possibility to earn backlink like others do.
As you know that with no relevant niche, the links have small effect in PR.
UPDATED: understanding your point that Rel=nofollow is not a huge problem like you see. There are lots of things in PR aspects; e.g. authority, backlink, inbound links, content-structure and many more. I suggest: just focus on high quality content that's what user need.