So far, there's pretty much always a friend and/or family where I've gone. I suppose if I go to do business exclusively with enemies, I might revise my answer.

Also, his comments in the follow up about refusing to answer to avoid the possibility of that answer being used later against you (no matter what you say) do have legal merit, but I don't feel that they are entirely practical. I think it more likely that they will attempt to concoct charges against you for refusing to answer their questions (drawing both attention to yourself and their ire) than answering the question in the most innocuous way possible.

I hate saying it more each time I do, but the best practical defense against law enforcement run amok is always to draw as little attention to yourself as possible.