So
I somehow didn't know there was an "Anti-snapcube" tag. I thought perhaps it was used to critique the group or something, but no, it's just to be cruel to a creator and all those who like her/their creations. I love their fandubs, I think they're hilarious. I like to watch them with my siblings. Going from the famous 06 dub with Memphis Tennessee to Spider-man with "can i ask you a personal question". Sure it sometimes gets irritating when all you see are the same quotes constantly in response to everything or when fans pressure voice actors to quote said fandubs, but that's just going to happen.
You aren't a "fake fan" for liking them. Even if you don't play/watch Sonic aside from the fandubs, you aren't necessarily fans of "Sonic as a whole" but of "fandubs", and that's alright. You enjoy whatever you want.
However, when I see the "anti-snapcube" tag, all I see are people who claim that the group/Penny are "ruining" the fandom. Which is ridiculous. It is a fun, harmless thing they're doing. In fact, they are introducing new fans into Sonic and other fandoms. It's nice to have fresh audiences every once in a while. New people to introduce what you like to.
I guess, ultimately, stop attacking people. Fans, whether passive or invested, and creators alike.