I know a lot of kids at very young ages who speak using bad language, they call adults around them names and they are very loose with calling women the "B" word, and as I watch this I am just shocked that their parents or guardians haven't done anything yet to make this kind of behavior stop. I witnessed this at a party and some parents had their kids along with them just as I was with my daughter, and all throughout the party I just felt very disturbed with how some 11-year-olds were acting.

The adults around me did not even mind to correct these children, and I did not correct them myself because I did not know their parents personally so I felt that I basically had no right to enforce morals to their kids, but it took most of my energy to simply just turn the other cheek.

Indeed you have not the right to correct others people children when they behave badly with other folks ,however if the kids are being impertinent in relation with you ,in that case you have all the right to tell them how do you consider their behavior.
And if their parents are there and hear you , the better !

It was very hard indeed to try to ignore these children who were clearly very misguided ones, one time or another I'd see an adult shaking his head in disbelief upon hearing the bad words that come loosely from these kids' mouths, but that is all they really do and assuming that the parents of these kids are around in the same crowd, I just feel very embarrassed for them.

How could they have not corrected this kind of disrespectful behavior before it got out of hand? How could they have not stopped it sooner, and have allowed for it to develop on to a very disturbing level?
I clearly have no idea why, but these parents seem to deserve the spanking more than their children do.

If the child was taught to behave themselves from the very start then there's a chance that behaving poorly at school wouldn't happen. But if the child does know better then the child needs a good talking to. If things don't become better at school then maybe the parent should look into some kind of problem that the child has. Possibly ADD.

Usually these kinds of behavior are influences from their friends in school. It is very hard for a parent to keep her child value-rooted when she sends him to school everyday exposed to all the other children who are not as behaved as one would like for them to be. You would have to follow-up on your kid everyday and make sure that he is not absorbing any bad influences from any of the kids in school, and sometimes it could get very hard to update one's self every single day.

A serious problem is when bad behaved children at school would call your well behaved child 'stupid' ,"moron" ,"idiot" just because of his well behaving attitude . If the child admires such groups and finds "cool" to be part of them , for sure he'll be influenced by their behavior and all the good things taught at home will vanish away.