Kevin Puetz ti 2005/1/25 ChS 09:57 sia-kong:
The best proposal I've seen so far is to apply it to all recently-modified pages (with 'recent' determined per project by how fast you think the editors will get it cleaned up - probably a day or so is reasonable).
This is sensible.
It would also penalize valid pages that just change frequently (like, say, the front page) but I would think most such are really not good sources of PageRank correlation anyway.
Assuming that high frequency translates to "well-patrolled", then maybe only recently AND infrequently modified pages would be "nofollowed". Spammers, of course, might then hit a page multiple times to have it appear well-patrolled.