Is there a way to completely turn off or block all XBOX users while flying online? It gets pretty irritating having them buzz around while doing formation or precision flying. We block them the moment we see them, which is pretty easy to spot.
Nose diving into the runway or trying to fly a 747 upside down is normally a dead giveaway…
I can guarantee you it’s not just Xboxers…
LOL… I know, but gotta start somewhere, so looking for the lowest hanging fruit.
You’ve been sucked into the “XBOX are gamers, not serious simmers” crowd.
PC users will praise you.
XBOXERs will vilify you.
Suggestion: just go fly! 
There is no way to separate users from different systems.
It’s the same deal was with every online game: find people you can play with and use a private lobby - in this case called “group flight” to have fun without randoms doing silly stuff 
You may use Groups.
A reminder about the SOP in the Code of Conduct on this forum.