l-j - // Where are their brains. They may be safe but they may have other friends, family members and acquaintances who are not.
What makes them feel they have the right to behave like this? //
In both instances, you are expecting a level of thought outside the individual, where actions have cnsequences that are considered in adance of the actions themselves.
That mindset belongs to the mature adult, someone who has some experience of life, who sees consequences to actions, theirs and others, who has developed a sense of maturity and empathy and responsibility.
Which of these are found inthe average student?
That would be none!
Students are large chidren. They have no real experience of actions and consequences. They are competely egocentric - their minds revolve around what they feel they want and need, and they literally have no thought for other people, and what may happen as a result of their own behaviour.
The chances are, if you asked any of the students attending these parties your question - what makes them feel they have a right to behave like this - you would get a series of blank stares.
Not because they are being rude and ignoring you, but because the fundamentally have not the slightest inkling of what you are talking about!
Students don't think, they do - then they grow up and become adults, and the next lot of students do the same thing.
So sadly, you will not get sensible answers to your questions from the students themselves who are normally under twenty-five, but you can get this from me, because I am not twenty-five, I am sixty-six, so I know a bit more about what goes on.