it seems like you are making separate claims and confusing with each other. let's examine what you said.
I'm only speaking of the individuals right to "freedom of choice". Whether one wants to engage in SELF destructive activities should be the choice of the individual; for example, a group of men can engage in idiotic behaviors which can and are harmful (i.e. Jackass, Viva la Bam, etc), and it's ok, even funny by society.
in this paragraph you make at least two claims. one appears to be the opinion that people should be able to engage in self destructive acticvities. however, not only is this not really relevant to the topic question, your example also does not support it. it's unclear whether you are talking about illegal behaviors or socially unacceptable behaviors. first of all, jackass, while much of it is legal, is by no means socially acceptable among all of society. there is certainly a segment of society which finds it funny but there is also a large segment of society which finds it deplorable. for example, joe lieberman's actions against the show which resulted in MTV's no longer airing older episodes and moving the time slot back. i'm not even sure here, how you are trying to relate this to drugs. some drugs happen to be illegal and some legal (for example alcohol). some are considered ok by most of society (alcohol), some are considered ok by a large segment of society but not the majority (cannabis) and some are considered not ok by the majority of society (meth). but none of this really addresses the point i was making. i was saying that, it's quite possible to feel regret or remorse or whatever even after engaging in an activity that is condoned by society. for example, some people don't like the idea of consuming alcohol because it's harmful, even if society tells them it's alright to do so. some people wouldn't feel right about performing the stunts on jackass or even watching it, even if society tells them it's funny and ok. so, you really need to clarify what you're trying to say.