Hmm.
I'm assuming from the disparaging comments mide that you're not actually conversant with the kind of abuse that people get on Twitter merely for expressing a pov that men don't like then. I'll give you and example to help you out then.
A friend has had all her personal details put on Twitter and other places. She has had to change all her phone numbers, landline, mobile, work, all her email addresses including work. Her employers are deeply pissed off because she has been receiving parcels of some really nasty stuff to her workplace. They know where she lives and works. She has received emails and calls detailing exactly how these men will rape and kill her. Even the threat of doing this is enough to scare women away from Twitter.
Yes, horrible things get said all the time. So do things like those that happened to my friend. So does swatting, happened in fact to a couple of MNetters because they dared to make flippant remarks on Twitter.
Just to repeat, blocking doesn't stop anything. Creating a new account and starting all over again is simple. Twitter does nothing. The only way to get Twitter to take this seriously is to take it to the media. Or perhaps you can suggest a better way of doing it?