You folks posts your drug threads on a fairly routine basis. All you need to do is go back and look at the people who post to those threads. It's not a very wide spectrum of FR's; indeed, it's a pretty narrow spectrum of the same ol' people. The end the WOD threads attrack very few new responders.
It's easy enough to verify yourself; the vast majority of those threads are over in the smokey backroom unless they were removed all together.
Besides, to be accurate the poll would need to be multi-question. As I said before, probably the majority of FR'ers would agree that minor possession of pot is a waste of time...but many of those same people would think manufacture and distribution is not. And even less would think legalizing hard drugs is something they would support.
And while a lot of people cringe over forfiture laws that doesn't mean they don't want coke dealers out of their neighborhoods.