This problem is especially bad because SEGA has been asking prominent streamers to promote PSO2 (and New Genesis in particular). When they got to the multiplayer section, people would start spamming and the streamers would be unable to find ways to turn chat bubbles off. They would then say if they can't find a way to turn it off, they would have to play anonymously instead of streaming. I can provide examples in PM if you wish.
The developers ought to make this issue one of their top priorities for PSO 2 (New Genesis), unless they want no well-known streamer to stream their games. It feels like the devs are not at all used to accommodating modern streaming practices. And no, please don't talk about reporting bad people or hoping people will behave. It's already too late when a bad chat bubble shows up in front of 20,000 live viewers.