If you go out anywhere in public you'll find people getting beaten up, robbed, stabbed and racially abused as well. These are part of the "real world" too. Should we consider those acceptable just because a minority, like the minority who swear, like to do them?
Should we also consider gassing people in Syria, torturing people in North Korea, and detention without trial in China acceptable just because a minority choose to do them?
You might consider these examples extreme, and they are, but a line has to be drawn somewhere. If you let people get away with the minor offences, then it can only escalate to other things.
Just wow! You're trying to draw parallels with someone dropping the F word with violent muggers, racists and oppressive dictatorships.
You start handing out tickets for every minor offense, like swearing, and pretty soon you end up living in a police state. Can't have the proles stepping out of line can we. What next, no kissing in public or holding hands because they're deemed offensive? You end up turning into one of those afore mentioned countries.
In this instance here in this game, the easiest accommodation would be to be able to just have a simple check box as to whether you want the profanity filter on or off. Then you can "choose" whether you want to be offended or not. The same thing exists in many other games, where you can toggle off the gore or the bad language etc, why not here?