TTT - // AH: "you have no evidence to suggest that this man is going to rape anyone again " - but surely past actions are at least an indicator of future tendencies. //
No problem.
On that basis, you'd better bang up 'Tommy Robinson' - he has been criminally convicted on several counts - so if he's likely to do it all again - and your logic confirms that he is - get him off the streets now, and save the public the bothersome and expensive nonsense of trying him all over again.
Oh, and he doesn't get a chance to form another gang of self-righteous violent racist thugs either - it's a win all round!!