Sooner or later these types of "members" will reach your blog, forum, website and test your patience (everything will depend on how fast your project will grow). So, be ready for it because dealing with them can be very annoying (and the headache is almost certain).
It's clear that the most obvious option is to always exclude them (is what everyone would think of as the first choice). But when they come up almost routinely... How do you deal with this "sea of ??boredom"?