This stupid definition of trolling is misusing the word’s usefulness. Trolling is NOT disagreeing with an opinion online in a discussion.
Real TROLLING is going to an online place where you don’t belong, sort of a non sequitur, and rabble rousing. For instance, going to a thread where people are discussing favorite wines and ripping alcohol to shreds. Going on a dog breeds thread and declaring that only rescue dogs are the proper pets. Going on a conservative website and declaring love for Hillary.
You can’t “troll” on an MSM site or a generic political site by stating an opinion that might be different from others posting there. Calling “diversity of opinion” trolling is like saying there is only one right way to think and it is yours. It’s immature and anti intellectual.
IOW, it's leftist thinking.