For some reason, people really do seem threatened by the game potentially being really good, and whenever more articles crop up stating that the game is, indeed, really good, and also different enough from Smash to be worth a shot, they dismiss it as "well, Sony is buying positive press!"
It's absurd. I mean, why would people want a game that's trying to be as fun as Smash to suck? Considering how long it's been since Brawl was released, I'd imagine that they'd be more intrigued by a similar game that could tide them over. PBR isn't going to steal Smash fans away from Smash. But it may certainly scratch a particular itch they have when they aren't in the mood for Brawl, or want to play something with solid online.
If PBR is good (and it certainly is for me), that's not going to somehow diminish Smash's quality retroactively. I just don't understand the intense hatred this game is getting, ESPECIALLY from many people that haven't even played it.
EDIT: @ Laughing Banana: No, I don't think the youtube tag was "hilarious." It was a tag. On a video. Of a game that shares inspiration and similarities with Smash Bros. I understand why people are mocking it. I just think it's childish and silly. This isn't $599 US dollars levels of insanity that deserve memes and mocking. If having that Smash Bros tag somehow got people to look into PBR because of their interest in Smash (and knowing that the next one is still a ways off), I don't see what's so bad about it. Personally, I like to know about games that are similar to games that I'm a big fan of. I've been looking for more games like Monster Hunter and Gods Eater Burst since I was turned onto those games by GAF, so if a tag for something like that cropped up while I was searching Gods Eater, then I'd be happy to have stumbled across it.