Let me clarify. There is a time and place for everything. Case in point, a public space crammed full of unknown people is rarely an appropriate time and place for cursing IMO.
I have been known to occasionally spout off a curse word, especially if overly frustrated with something. However, that is typically in a private setting among known people, often with like minded stances on such issues.
In stark contrast, if one goes on a cursing tirade in the company of strangers, then the possibility of being thought a fool probably increases exponentially.