That's why you can't ban wearing shirts that say, "religion is dumb" or "environmentalism is immoral". Denying people the liberty to express offensive views infringes on their rights far more than hearing them infringes on anyone elses, so we don't do it. "Recklessness" is rather the central issue here; we and our laws generally accept that people can be fairly reckless with their own lives, but not those of others. Again, that's why you can bungee jump off a public bridge or sky dive through public air; it's rather absurd to say things things like that should be legal but the state has the authority to force motorcyclists and bicyclists to wear helmets to "keep them safe". Likewise, the fact you're on your own private land doesn't give you the legal right to torture and murder other people (which is one of the reasons people argue against even private abortions, and if a fetus could be proven a person the law would be on their side), it just means the cops need evidence to suspect you before they can come look for proof. Forcing others to live as you think best doesn't keep anyone safe, even if you convince 51% of the public to agree on what's "best". And by the way, I find all the talk of childishness a rather amusing attempt to justify what amounts to "everyone must do what I say and anyone who won't is stupid".