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it's unlikely that Google can crawl the Facebook page with the link anyway
Think about this for a minute:
How sad is it that Google can cause someone to be afraid to link from one page they maintain to another?
I mean feel free to link as much or as little as you like. Facebook is sort of a half-gated community, and what happens there shouldn't affect you in Google. It means it won't help you and it won't hurt you with Google.