If chemicals in your brain have no effect on free will, then they have no effect on free will. Saying that they cannot force you to do things implies that they cannot force you not to do things either. When I say something is blue, do I also have to say: It is not red, it is not green, it is not yellow... ?
*Edit: And by the way, wtf is wrong with being biased, anyway? You sound like a relativist when you say that. I'm biased towards truth and against bullshit. Tolerance of views/actions you feel are incorrect is almost as bad as doing those things yourself. I don't mean you have to go out and shoot people you disagree with, obviously that would constitute first use of force, but you don't have to make their immoral lives easier either.
Sorry, bad choice of words on my part. No, there is nothing wrong with being biased towards truth. And pointing out every possible exception is a waste of time. What I was trying to say is it is important to make sure to be clear towards the audience you are confronting. What I mean is..
Oh hell, I think my exposure to the general public is getting to me. I am used to people not knowing what they are talking about, and correcting them. I will just assume everyone here is intelligent enough (please don't prove to me otherwise) to know how to not get caught into infinite misunderstandings.
All I was worried about was the sake of clarity. Obviously we are not going to walk into a mousetrap because chemicals tell you so, unless your a masochist or suicidal or both. Pointing out the other extreme can, however, shed some light to the audience in case they are stuck in their ways or overlooked that point (I am not accusing anyone.)
I'm not very tolerant of false ideas, however I try to make people understand my ideas first before I correct them or settle with a stalemate.