And if you'd gone around telling people that Alan Wake is in Control before they played it back when the dlc first came out that would have been a spoiler too. It's debatable now because of the age of the game/dlc, but atm Alan Wake 2 is still new and lots of people haven't played it yet. This isn't rocket science my guy idk why it's so hard for you to understand. Ahti showing up in Alan wake isn't a given just because they exist in the same universe, because he's originally from a different story and didn't even interact with the Alan Wake stuff from the Control dlc. Since you wouldn't automatically expect him to be in the AW2 story he wasn't originally a part of, saying he's in the game is in fact a spoiler. Not a big spoiler sure, but still a spoiler, and some people want to avoid even small spoilers, so tagging for them is good manners.