So what you're saying is that some people enjoy RolePlaying a jerk. They're different from the rest how?
Using the word fluff is F word is unnecessary. Not that I care about it one bit, but there are so many alternatives. If you're going for immersion, try using immersive language instead of stereotype language.
To RP is to play as someone other then yourself, think of it like acting but instead of standing up in front of an audience you write it all out. Truth of the matter is, many of us like to RP as people from all colours of life. From the average Joe to the warlord (this is just an example, a warlord would likely be seen as over powered).
Lets look at the average Joe, he may not curse when he can help it, but he will likely indulge in cursing like a maniac if something bad happens (just like you and you can't deny it so don't even try). Sure, we could stop him from cursing, but that would, in effect, change the character himself and that's almost taboo to most RPers and for good reason. Some of us spend hours making one character, to have to change him for any reason is offensive (unless it's for a valid reason, like he was overpowered, he broke a rule, etc.).
Fact of life, 99.9% of us will/have cursed when something tragic happens, or if something extremely good has happened. Do you know why humans created the first curse words? Because they were simple words they could use to express profound feelings they felt they couldn't express any other way. Keep in mind this happened when languages were young and words few (yes, that far back). These are the kinds of words that most young heroes will use when they win or lose a tough battle that took hours or days to accomplish/fail at.
To say that someone is a jerk for cursing here-and-there, is ignorant, and your ignorance really shines for saying so. Some of the greatest minds of the human race have likely cursed. Not only that, you're not only insulting me for saying that some of my characters are jerks, but you're insulting at least half of the entire RP section here.
If you're complaining about people not being able to choose their words better than why aren't you? Oh the hypocrisy, it shines brighter than 24 karat gold in the sunlight.
If you don't care about a topic, don't bother replying to it please.