Let me ask an honest question: Why do you need this for BF? And doesn't this imply you have something to hide in addition to keeping away from? Please, assess whet you are wanting a VPN for. It's NOT for remaining 'anonymous'. It may just sound neato.
And certain IP addresses are blocked because stuff oozes from them, period. As you were told, they get blocked here for several reasons, the main reason being BF got cooties there before or something. Protecting the integrity of this site (or any other) is above all other considerations.
Think about it awhile and it will make sense to you. You have to work with the site's rules, not the other way around. Internet freedom is for the site (as long as they are legal) and it's users uphold it's freedoms (or rights).
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I don't know nothing, and I memorized it in school and got this here paper I'm proud of to show it.