I've noticed an increasing number of spam users over the past few weeks: new accounts which don't post any nodes but put a link on their home node to their external site for SEO benefit. I wonder if a threshold for this facility should not be put in place such that it is unavailable to initiates? Either disallowing links in the Bio or just disallowing the Bio entirely would work.
Or maybe the spam links aren't considered that much of an issue, I don't know. Any thoughts?