The rules for WoW have not changed in 20 years. It is now easier to report people than it was 20 years ago, but the rules remain the same.
There are places in the world that have rules, and where you can’t just say or do what you want around strangers, or even people you know. Keep the colorful chat to private groups with friends who won’t report you. Be on your professional/best behavior in public groups/chats.
Keep in mind, the people reporting you also paid money to play. Blizzard does not go looking for violations, they enforce them though when customers report them and when the chat logs back the report.