Alright, I was gonna refrain from posting in this thread, but fuck it, I'm drunk, so diving in.
Back in college, I was at a party with several friends. There was a totally regular guy there (a bit obnoxious, but otherwise, normal enough) that, out of the blue, began molesting a female friend of mine. She was, quite clearly, telling him to stop. Thing is, he was "that goofy guy", and everyone else there was laughing it off and saying shit like "oh, him".
I told the prick to stop. He looked me in the eyes, laughed, and proceeded to squeeze her tits. She looked at me, genuinely scared. So, I grabbed his hand, told him more firmly to stop, he grabbed at her thigh as everyone else laughed, and I broke his fucking hand, grabbed the motherfucker, and threw him into a wall (I was heavier/stronger then >.>)
I was the guy who was asked to leave. Actually, they demanded I apologize to the little fuck to boot. Instead, I chilled with my friend in the bathroom as she cried. On the other side of the door, he was taunting. No one else there fucking cared at all. Note, these were her close friends.
We left. At another party, we happened to run into him again. He pulled the same shit, with a completely different crowd. Once again, it was laughed off. This time, I pummeled the shit out of him. When asked why by some dude, I explained and he seemed to understand and be okay with it.
A few weeks later, at a pizza place, that same dude I had talked to came up to me and told me his girlfriend had been raped, multiple times, by the same fucking guy. She was afraid to testify alone against him, though. So, my friend and I went to testify with her. I was interrogated, for several hours, and accused of everything from heavy drug use (nope) to just making shit up (also, hey, nope). It wasn't until I flat out turned myself in for assault and asked that they at least look into the case that they said it was enough and stopped. One of the three detectives high fived me, saying he wished he could beat the shit out of a rapist. My statement as a whole was dismissed.
Instead, they made the girl that was raped multiple times call him up and ask about the entire ordeal on a taped recording. When he finally admitted, on a taped phone call, to raping her, they arrested him, and he was promptly bailed out. He then proceeded to taunt and harass both the girl he had raped and my friend that he molested. When the girl that he raped told the cops, he quickly moved out of state and they, once again, dismissed it.
He's still out there. He seems like just a regular guy. Nothing was done to actually stop him from continuing to rape and molest girls. His friends still stand by him, and excommunicated my friend and me, calling her humorless and me a crazed freak. This is, quite sadly, not the only case of a friend of mine being molested/raped that I've been informed of. It's just the only one where they were even willing to bring it to the police (and even then, only because a different girl that had been raped was too scared to do so by herself).
Rape is definitely out there, and it's way more accepted than you would think. It's not just the creepy guy in the alley. It's that goofy guy in your class. It's the hipster kid you know with awesome taste in music. It's your good friend's father. It's your other good friend's ex. And it's not taken seriously by law enforcement, society as a whole, and direct witnesses.
More on the topic of the OP: I'm actually opposed to censorship, and comedians should be allowed to say whatever fucked up stuff they want to if it's funny. That said, rape itself isn't funny, and a good comedian will know that the joke better be damn good if he's gonna try to pull it off. Tosh, quite clearly, didn't have the material to back it up. Audience members shouldn't interrupt a comic's schtick. Comedians should know that if their audience is genuinely, vocally opposed to their jokes, it's not really "funny" to talk about how funny it would be if they were then gang raped.
If you find rape to be funny, you probably don't realize that people that you know, people that you love, have been raped. Also, you probably don't realize that people that you know and love are rapists. Yes, there are rape victims and rapists on Smogon and in your real life. Do you think I'm being crazy and that you'd aware of that if it were true? Odds are, you really, really wouldn't if you think rape is funny.