implying that repression of one's sexuality cannot (or may not) lead to depression, self-harm, suicidal feelings and even suicide itself?
Where did I say that?
Oh course it can - that's not the same as 'will' though is it?
I'm not talking about repression of free speech, and I've not said it should be restricted
Sometimes you have to just say "No", and this is one of those times. Why should we allow these organisations to actively advertise their destructive, horrific, potentially-lethal services?
Saying "No" and not allowing something is different to banning it? Sounds mightily like it to me.
We have a duty and a responsibility to all citizens of this country, and its visitors, to protect the vulnerable and those at risk. We need to have protections and safeguards in our advertising laws to protect people from snake-oil merchants and those who peddle potentially-lethal cures for any conditions as any medical and/or psychiatric treatment should be done by licensed professionals only, and those who are licensed and have practiced such "cures" in the past have generally been struck off or warned in some regard.
They're not claiming to be doctors so your reference to doctors being stuck off is spurious.