Well, technically mostly harmless, but in the event of live action characters being shipped, and it spilling over to the actors (since a lot of people think actor = character for some stupid reason) it can be incredibly harmful. Same thing for streamers for instance. People collab together quite often, and the fans start “asking questions”. No matter how many times a streamer says “no, we are just friends”, people will get weird. Then imagine being a different streamer wanting to collab and seeing all of this.