Some young adults need a crash course in courtesy. I've seen a handful who've not even bothered giving way to disabled elderly inside malls and other public spaces. In fact some have even cut into or blocked their path.
I don't think most of them are intentionally being malicious. I'd like to give them the benefit of the doubt and say they're simply unconscious--not being fully in the moment and more importantly not being mindful of those around them and their consequences on the same.
Awareness and thoughtfulness. Such essential habits in altruistic societies.