*Note, if you don't read my whole post, don't bother replying*
Anyways, many people want to to rehabilitate rapists and pedophiles, yet say that gay people are born that way and cannot be changed. Rapists and pedophiles are born that way and cannot be changed, they will always want to hurt others no matter what you do, the same way gays will be attracted the same sex no matter what you do to them. They are both a sexual attraction in the brain that cannot be 'fixed'.
Now, I am not against gay rights, IMO they should be able to get married and do their stuff like everyone else, just stop being attention whores.
edit: Sorry I didn't mention this, but I know gay people aren't rapists. I know RC5908 thinks I'm a gay basher, but I know gay people don't hurt others. I know he will still say that I think gays are as bad as pedophiles, but IDC about his lies.
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I am a big advocate for a change in the social perception of paedophilia. What this means however, is not a rehabilitation system in order to stop them being attracted to children - like you said: impossible. The idea is to get society to open up to paedophiles and offer them our hand, in order to not criminalise and alienate them and to minimise the potential for children to be harmed. Rape, though? -blam!- is to do with power, not attraction. It should be dealt with like any sort of mugging or assault, albeit more seriously.