I don't see why I shouldn't say what I think.
B. Rules Related to "Chat" and Interaction With Other Users. Communicating in-game with other Users and Blizzard representatives, whether by text, voice or any other method, is an integral part of the Game and the Service and is referred to here as "Chat." When engaging in Chat, you may not:
(i) Transmit or post any content or language which, in the sole and absolute discretion of Blizzard, is deemed to be offensive, including without limitation content or language that is unlawful, harmful, threatening, abusive, harassing, defamatory, vulgar, obscene, hateful, sexually explicit, or racially, ethnically or otherwise objectionable, nor may you use a misspelling or an alternative spelling to circumvent the content and language restrictions listed above;
If Blizzard decides they want to punish a user for using profanity, then they have the right to do so. If suspending or banning players was that detrimental to their profits, they wouldn't have this rule in place.
If you wish to curse in game, do so at your own risk. People may report whatever they wish, and Blizzard may investigate and take whatever action they deem appropriate. However, they do have a penalty volcano, so most players are not suspended or banned for their first violations. Keep that in mind.
Furthermore, this discussion was from over a month ago. I don't think the OP is going to come back and read your response. Please do not necro older threads in the future. Thanks!