If it is prooved that it’s a plant, you know Trump will have a ball with this.
One big tell that the guy was a plant was the fact that he disappeared from view. If he had been legit, he would have been happy about all the publicity and would have made himself known to the public with at least postings on the web.
Someone in Trump’s staff or his children probably go through this site and others to gather a pulse on what is going on.
I 100% believe Trump knows now about this guy and in some future response will point out this was a plant.