MMOexp Diablo4 commenters below the post mentioned
In the Diablo 4 subreddit, user DogBt posted a meme featuring an image of famous Hollywood actor Leslie Nielsen from the comedy film Airplane! mocking the game's repetitive buy Diablo 4 Gold crossplay message with a classic moment from the movie. While the message box doesn't take up too much of the user interface, the bright yellow text of the crossplay message can be distracting for a lot of players, especially every 30 seconds.
Additionally, the spam notification can end up hogging the message box, pushing other more useful information such as NPC dialogue out of view too quickly. Some commenters below the post mentioned that turning off crossplay entirely doesn't seem to stop the rogue message from appearing. Others chimed in noting that one must log out of, and then back into Diablo 4 in order for the change to stick.
Another user under the post mocked a different Diablo 4 message that notifies players of closing the blue portal they used to fast travel into a town upon leaving said town on foot. This large on-screen message can get annoying for players who already know how these portals work, especially since it plasters a Diablo IV Items for sale large text box on the screen every time instead showing up in the message box off to the side.