I like to. Sometimes I have the time. Sometimes I don't. This weekend, in NYC, there were 2 911 "Truthers" handing out pamphlets. I had an 8 year old with me, so I didn't think it appropriate to really engage. But I just looked at the guy and said "you know, they really did fly planes into the buildings that day." My niece wanted to know what the discussion was all about, but I figured I'd leave the details to the parents.
Soo...do you engage or just walk by and roll your eyes?