From ScouterJT:

From Eve: What makes this site great is that you have the option to remove a person/foundation from your buddy list so that you do not have to participate with their views.

I agree blocking works on a person-by-person basis.

But if the site gets a reputation for being overwhelmed by individuals/organizations with an agenda, then we all lose.

Exchange of ideas is one thing. Pushing an agenda (like posting 9 blogs in a 10-minute period) is another.