I subscribe and follow keywords of interest through RSS feeds, both on blog search engines and bookmarking tools. Though splogs have always been a problem, lately I have noticed increasing spam in bookmarking tools. What do we call it — b00kmarks? (read zero, zero)
In the more popular one’s (like del.icio.us) the LONG TAIL is highly compromised (1, 2), while in the less popular even the HEAD seems to have problems. The availability of many ready to use “tag and ping” tools is making things worse.