It depends on who swears, and why they're doing it.
Small children swearing, for example, you know that's not good, because their minds are too underdeveloped to know when it's appropriate, and it's obvious they're just mimicking those older than them.
Swearing in comedy is usually hilarious, and is often an integral part of the humor.
Swearing when
Pielikey said:
you stub your toe at 3 AM and spill your coffee and it gets all over your pajamas and scorches your chest and there's no other words to express your anger and pain.
is fine, it's incredibly stress-relieving and satisfying.
People who swear a lot though are just idiots. Weak-minded individuals who are either too stupid or too lazy to say what they want to say without stuffing in some profanity for good measure. **** this, **** that, ****in' **** can go **** themselves, I'm not ****in' putting up with this ****in' ****, and so forth.
You sound stupid. You look stupid. In all likelihood, you are stupid. STOP DOING IT.
OT: Regulation of swearing is just ridiculous. Whether they get it from their parents, friends, teachers, people they know or, of course, the internet, they're going to get it. Whether they decide to substitute every second word with a curse is entirely dependent upon their character. And if you tell them not to, they'll either ignore you or do it when you're not around.
PS: if you're a parent and your kids get it from you it can be really, really hard to tell em off, cause they'll just come back with "I got it from you". Nothing much you can say to that without sounding like a hypocrite.