I think you and the EFF are using different meanings for endorsement. Yes, by accepting it they were saying "we recognize that these BTC have some agreed-upon v

I think you and the EFF are using different meanings for endorsement. Yes, by accepting it they were saying "we recognize that these BTC have some agreed-upon value and may be exchanged for good or services", and that is one type of endorsement. What they do not want people to take away, though, is an explicit or implicit statement that "we believe in what bitcoin has set out to do, and lend our [moral] support to the effort" and possibly furthermore "we believe this is a legal thing to do and that it is a freedom we will fight to defend." Those statements, explicit or implicit, are a different type of endorsement.