They have the option where you can disable the cuss filter now. The only way they mute you is if you swear to the point where users having the filter enabled can still read what you've said. Also, if you ask for a password/maybe lure someone, you might get muted. Fairly lenient like Xier0 said though.
Probably muted by a playermod or you just went reallllllllly overboard on the profanity bro. Don't be immature and keep things more formal and you wont get muted lol
People are getting a bit immature with the whole reporting people thing, there have even been people entering clan chats and reporting fellow clanmates. You just have to keep things tame, it's my only advice.