Not caring about opsec is a hit and miss thing. When it comes to the roommate account information like the Zeraora card thing it really doesn't matter; I've always maintained that it's smart for vtubers to maintain roommate personas as an open secret so that if anything goes wrong on the corporate end people know where to find them, and being one of about three actual Colress fans in the world makes it significantly easier to identify her. As long as she's not explicitly making the connection to the point where it gets her in trouble then there's nothing wrong with her activity there.
The problem is the real life side of things. I'd like to think nobody on this forum wants to hurt her and the guys piecing the information together earlier were just doing so out of curiosity, but the problem is that if we have these clues to work with, then her unicorns, schizophrenic antis, and Twitter detractors have them too. I think she's still in the mindset of a smaller streamer who gets lost in the crowd, and while I'll just tease her a bit about the "it's a bubble" stuff, I feel the need to be blunt here: Pippa is a very well-known streamer now, and like with any other prominent online personality, that puts a target on her back.
It's easy to focus on the extreme, worst-case scenarios, but I realise that's an easy way to get written off as paranoid - so I think I should also mention the more mundane, but still unpleasant problems that she's leaving herself open to. The local IRL gossips who want to know everything about her job, and will try to leech once they realise she's successful. The trolls who'll send pizzas to her house every time she streams. The social justice warriors who'll call up her parents when she gets clipped reading an edgy superchat. Every one of these will lead to an annoying, anxiety-inducing conversation, which I know for Pippa is the last thing she'd want.
Thankfully it's not too late to change course, we don't know her address, phone number etc., but please be more conscious of this going forward, rabbit.