There is a problem though, with imagining that taking risks makes you a hero. It doesn't. Sacrificing your life for a hobby doesn't ennoble that hobby, stop pretending it does.
There is also a problem with groups that solicit money from others making promises that we know they cannot keep. Like Mars One. We all have a role in ensuring that those scams/ineptitudes are exposed before people get ripped off.
You claim that you don't care about people doing stuff like BASE jumping, mountain climbing up Mt. Everest, or doing other potentially life threatening things, yet you complain about people going into space on their own dime.... with or without voluntary sponsorships from others. Yet here you go and say precisely the opposite.
It is the same thing for those who want to go into space.
As for Mars One, I think those guys are full of it and don't know what they are doing, and legitimate engineers and even fans are trying to offer help yet it is being rejected in favor of fluff and pomp. That is why Mars One is going to fail, not because they are trying to attempt something foolish. I'll also agree that there will be scam artists and people with less than honorable intentions who are trying to milk those with a dream of someday working and living in space, some of whom have some serious money to offer as well.
Still, what you fail to realize is that there is a good chance that with enough effort, brains, and attention to details that some of these project which are being proposed can succeed. I can't say if Elon Musk and his crazy idea of going to Mars is going to succeed or not, but one thing that certainly distinguishes him from Mars One is that he has put stuff into space, vehicles are orbiting the Earth right now that have been put there with his companies, with several billion dollars worth of money from people who do not lightly spend that kind of money already committed to sending much more into space on his rockets. I think that should count for something, which seems like you are casually dismissing too.
Again, I am not asking you for anything explicitly other than to suggest if you want to help, work with me and others who want to go into space. If you think it is stupid, move along so you don't get in my way. And please, give me the permission and opportunity to do this kind of stuff instead of holding a gun to my head and telling me I can't go into space. It doesn't matter if you do it personally or have laws enacted and a government thug does that instead... it is the same thing in the end.
I don't want to rob you through taxation as I think this can be done completely with private funds and without the government's help. I do know there are some in the space advocacy community, notably Neil DeGrasse Tyson, who want to point a gun at you and force you to pay for activities in space... so know that not everybody even has the same attitude about how to get there either. For myself, if the funds to do activities in space can't be found, that sort of is a "vote with wallets" to show that it may indeed be a futile effort but if the means to get this done can happen with private funds it is something that should be permitted to happen too.