To begin with, try starting a thread without insulting a group before you know all the facts. Try asking first, it hurts our feelings.
Players can .report you and that will result in a mute. Perhaps you were met with an abuse of the .report feature.
The system has warnings built in that will result in the system itself muting you for typing foul language.
It's possible you said something long before your clean screenshot that got you muted.
Regardless of any of the above, next time, send your screen shot, film or time of the problem to support@hitechcreations.com and they can check the logs, yes they will see the Whole story, and if there was a problem with a moderator then it will be dealt with. But please, try and avoid insulting people without all the facts in place.
Other than that, if you are being in any way abusive or disruptive in the SEA, you will get muted, that's just the way it is. If you get muted wrongly, I explained the process to resolve it, if you got muted for your actions, change your actions.
Hope this helps.