Just so. The reason trolling is so common is because it works. If it didn't, it would be pointless.
I think we can both appreciate the apparent futility of counseling against falling prey to it, as doing so most certainly won't end it. But I'm not convinced that such efforts are truly in vain.
As the Internet matures and we as a species become more accustomed to the social compression global instantaneous communication affords, I think we can collectively mature along with it.
Knowledge is power, and shared freely, our power grows. Even if total success is not assured, partial success is better than no success at all.
The most distant of goals are often the most worthy, and though one pebble does not a mountain make, with enough hands placing them, a mountain may form.
Or something like that.
Insert something profound here.