Yes, but that's not the norm. Plus, I know for sure that some of those people's careers needed to be destroyed. It's no different from a newspaper in the 80s writing articles about a lame CEO ruining a business due to his corrupt ways. And like everything in life, social media isn't perfect.
This is something that our 21st-century society will have to learn to engage with. Many of us will have to learn how to view social media and understand that even though 5,000 people are hounding you, it doesn't actually mean you will be destroyed. Sometimes it's just a bunch of jerks that are vocal and creative enough to come up with an interesting hashtag. If there's no meat to their complaints, it'll eventually blow over.
I can see why you'd feel this way, but it's honestly not true. Yes, extremists absolutely have ruined many good\innocent lives. But it is balanced out by social media pushing many great causes and awareness campaigns too. And we shouldn't put every controversial situation that pops up on Twitter as this life-ending scenario for the subject at hand. Many times things do just blow over, if the person in the limelight handles it well. In my opinion, Colin is a clear example of this. He created his own podcast and Youtube page after leaving Kinda Funny and is doing well. There's still some blowback from his political opinions and brand that he's created for himself (hence why PAX refused to let Colin host there), but business for him, in general, is still going good for him.