He seems like a douche, but he could just be some kid trolling you as well. This is one of those dramas that dosent have enough proof to fully turn the tables in your favor, it could go both ways. This guy really could be an idiot, and well deserving of this drama, or he was just some kid who decided to troll you by threatening to use your build even though you didn't give him permission, if the former is true, then DrumStix really is stupid. If the latter is true, you blew up at a kid that was just trolling you and drama'd him just because he made you mad. For your sake i hope its the former.
Also, he is NOT the new Tezuni, Tezuni is easily worse than his kid.