What do proshippers generally believe about shipping real people? Stuff like creator x creator or celebrity x reader?

That it falls under the umbrella of "you should be allowed to write anything you want". Once again, it's not my personal thing. There's no real life pairing I read for, and the whole "blank x reader" is not appealing to me at all.

But I have no problem with people writing that stuff, or knowing it's out there. I saw someone a while back say that it's basically just writing about another character, and I agree with that. No matter how much a creator posts or how open a celebrity seems with their personal life, we're still only seeing a tiny snippet of their lives. We have no clue who they are when the cameras aren't recording because we just don't know them. And whatever someone chooses to write about is mostly stemming from that particular persona that they happen to put on for the world and that's it. It's completely separate from our reality because they're basically just writing about another made up character

The problem I have, and it's what I imagine most proshippers also take issue with, is when people start blurring the lines between fiction and reality. To me, there's a world of difference between posting something on ao3, and speculating on secret relationships in the comments of someone's youtube video. Or between talking about something on tumblr, and tagging the person directly on twitter.

I just don't understand people who condemn rpf and talk about how gross and invasive it is, but think it's funny to tag celebrities on twitter to bring up (what they think is) cringe-worthy fanfic tropes that people have written them into. Or people who print out fanworks to shove into an actor's face at a meet and greet and ask them what they think about it. That's where the lines get crossed, to me.

I think ao3 and tumblr still have an air of mysticism to them. A little secrecy, a little privacy. In the sense that someone in the public eye would have to put in a little work to find this stuff for themselves. They'd have to go to the site and search themselves up to find anything. As opposed to just about anyone in the world being able to force this content in their line of sight with a simple @ on a site like twitter.

So to me the problem isn't that this content exists. The problem is when people don't know how to keep fandom stuff private. Write all the rpf you want but remember at the end of the day these are real people, not your blorbos. You don't know them. It's inappropriate to say these things to them personally (which yes, also includes tagging them on twitter or in the comments of their videos). But it's also inappropriate to run up to them with other people's content just to say "look what these FREAKS wrote about you!!" And I think people either forget or just genuinely don't care about the latter.