Let's not forget sexual harassment. Can your words be misconstrued as sexual harassment? It all depends on who is the recipient of your comments and how far they plan to take it. Even an innocent joke can be taken as harassment.
Being outspoken can be a good thing. However, being a loud mouth is not. It's true that the "squeaky wheel gets the oil." But how squeaky should you be? Again, look at your work environment. Is this type of behavior encouraged or discouraged? Having opinions is a good thing, being opinionated is not. There are some people, and we all know who they are, who must have a strong opinion about each and every thing. And, that person must make that opinion very public. Choose your causes wisely or it will look like your primary cause is hearing your own voice.