Is Trump the product of the Internet?
Perhaps indirectly. The internet allows candidates to appeal directly to voters, bypassing traditional gatekeepers like party establishments and mainstream media. I believe that Donald Trump benefits from this, and that this plays an important part in both his success and the ineptness of Fox's and the Republican leadership's reaction to him.
I heard Trump uses Facebook and Twitter responses to determine his campaign and shape his topics (if you could call them that) in his speeches. Is he the ultimate "troller?"
I agree Trump is doing to America's political process what trolls do to internent forums (hogging attention, never mind that it's mostly negative attention). But I think that's a separate issue from his use of Facebook and Twitter responses to estimate his effectiveness at reaching people. Lots of people use such responses for this purpose. Few if any of them are Donald-Trump-caliber trolls.