Also, I don't think people realise the severity of BTC becoming illegal; if it does that then it will ruin it forever. BTC can thrive right now with nobody touching it, but as soon as it's illegal the community will become a fraction of what it was and the dream can never happen, whatever that was.
I've found that people don't really care about the legal status of an activity when it's easy to do it without punishment. See copyright infringement as an example.