This was a brave thread to start, Muna. Mad respect!
Guys, there's no excusing the behaviour of ourselves or our fellow men. Of course, I'm guilty of soliciting nudes. I'm not going to say I'm not, or sugar coat it. And don't you fucking bullshit me: a good many of you have done it too. Hell, I'll go so far as to say 9/10 of you have asked a girl you really liked, or was dating, for nudes. It's not a wrong thing to do. It is a wrong thing, however, when rebuffed, to go fucking haywire and start brow-beating, bullying, and doing a whole slew of other things that paint you out to be a fucking sexual predator.
The solution to this, as people have said, can't simply be "Ban him or block him." There needs to be more. There needs to be education, and honestly? Ostricizing. If someone is being cruel, bullying, pushy, or just making you feel uncomfortable, and you've given him your honest and firm NO (the Real No, not the cutesy little flirty "No" or that stupid "I don't know..."), then fucking blast him and tell the world who did it. Raise the flag, and tell his loved ones so that he can be shamed into being a better person if he can't be a good person all on his lonesome.
Now that we've settled this generation's lack of manliness, the next generation need to be taught that women aren't a sexual fucking object.
Cheers.