I'm of two minds on this question, to be honest.
On the one hand, trolling is just being a dick for the lulz, by definition something one should not do, nor have any aspirations of doing. It's a pointless waste of time and mental energy that could be better spent on practically anything else.
On the other, if someone is honestly and truly offended by the words of a complete stranger on the internet, they really need to rethink their priorities. It's the words of a complete stranger. They have no more power than what you ascribe to them. Being truly bothered by it is as much a waste of time and effort as the act of posting it is. Suck it up, recognize that the idiot is being an idiot and paying attention to them only fuels their idiocy, then move on with your life. Your blood pressure will thank you.
TL;DR version: Yes trolling can go too far, but anyone that gets pissed off about it is doing something wrong in the first place.
On the one hand, trolling is just being a dick for the lulz, by definition something one should not do, nor have any aspirations of doing. It's a pointless waste of time and mental energy that could be better spent on practically anything else.
On the other, if someone is honestly and truly offended by the words of a complete stranger on the internet, they really need to rethink their priorities. It's the words of a complete stranger. They have no more power than what you ascribe to them. Being truly bothered by it is as much a waste of time and effort as the act of posting it is. Suck it up, recognize that the idiot is being an idiot and paying attention to them only fuels their idiocy, then move on with your life. Your blood pressure will thank you.
TL;DR version: Yes trolling can go too far, but anyone that gets pissed off about it is doing something wrong in the first place.