There can be no defence for people who post death threats or threats of rape Jude. Twitter is not insulated from real life; Go around making threats to murder someone, or plant a bomb, or threaten to rape them would certainly be worthy of investigation and maybe more; Why do you think that these immature rage-filled morons, incapable of making a point without employing a threat, deserve any special protection?
And your last post is just blatant victim-blaming. Do you really think that women like Prof.Mary Beard, or Stella Creasey MP, or Caroline Criado Perez are "immature sensitive women"? And its not just them; There are hundreds of women who are routinely subjected to such malicious and odious threats, for no other reason that they are women, or that they have argued in favour of equality for women.
Attempting to defend such morons that employ such vile threats whilst at the same time attempting to switch the blame to the "sensitive women" carries a strong whiff of mysogyny with it. As does this non-argument that we must protect the rights or cretins to abuse and bully and harass and intimidate people because to attempt to regulate it threatens free speech and promises a bland, airbrushed future.
The principle of free speech does not, whatever you think, give you the right to say whatever the hell you like, to whoever you like, whenever you want to say it. With rights come responsibilities - something these cretins cannot even begin to comprehend, it would seem.
No man worthy of the descriptor would countenance this sort of vile garbage, spewed from the impotent minds of rage- fuelled cretins.