Whatever the post was, was flagged by other users of the forum. It will need to be reviewed by a moderator and if you are to receive a silence they will decide.
This has nothing to do with being silenced by Blizzard, you posted something that upset other users. The most common cause is breaking the code of conduct or the rules of the forum.
Blizzard have never and will never silence someone for making claims like the game is pay to win, if you search you will find plenty of people who weren’t silenced for expressing their opinions.