Valid point, but I think there's a few possible ways of looking at it.
The first is availability. Okay, he's using the name Melter. Why? Well, he wants a name brand. He wants a name that people might recognize, even if they know nothing about the dude himself. And I'd imagine the A-list legacy names aren't just floating around to be gobbled up. The big name legacies are rarely going to be up for grabs because those guys are on top and aren't planning on getting out of the game anytime soon.
Then there's the fact that there aren't a lot of dudes running around who's power is to melt things, you know? If you're a kid, and you discover you have the power to melt things... Well, the first thing you're going to do is melt things. melt a lot of things. for no particular reason. then for particular reasons. But then, if you're smart, you're going to go look around for anyone in the past who's gotten the power to melt things, and you're going to dig up everything you can on the guy, because he has experience, and you can see what he did wrong and what he did right. And yes, I think there is a possibility that kid might become a fan of Melter. Because they have shared experiences, they quite likely have shared objectives in life, and familiarity of experience goes a long way in attitudes towards people.
Plus, dude melts things. What the hell is he going to call himself other than THE MELTER? Hell, I wouldn't be surprised if he thought up the name before he even realized there was already a guy with that moniker.
But yeah. I don't think there's a lot of dudes running around the Marvel Universe with Melter t-shirts. Makes you wonder though, if there's a bunch of indie iconoclast kids who follow around specialized "indie" supers, and scoff at the popularity of "mainstream" heroes and villains.
"Dude, did you see Spider-Man save that short bus full of retarded kids from the Green Goblin this afternoon?"
"No. But I did see Elsa Darkstone punch a new hole through the Spot's rectum... poseur."
