While I disagree strongly with the Baptist's "reparative therapy," in the US, we have freedoms. Even freedom of religion. That gives us the freedom, among other things, to be wrong. However they can't do any real damage to homosexuals, unless they submit to their misguided reparative therapy.
So while I passionately oppose reparative therapy, I also acknowledge the Baptist's right to engage in it. Beyond dialog, any fix would require legislation to deny certain rights that of one group, that another finds abhorrent. That in the end will also trample other different rights of other people through precedent.
When you limit your neighbors rights, you trample your own.