waste
If I see someone littering everywhere, I will remind them to look for trash cans. If they don't listen, I will find the staff or police nearby and report this uncivilized behavior.
Spit/spit everywhere
If I see someone spitting everywhere, I will remind them to use handkerchiefs or paper towels and encourage them to spit in the right place.
♂? Queue up to cut in line
If I meet people who cut in line, I will politely remind them of the queue order and point out that this behavior is inappropriate. If this person still doesn't listen, I'll ask the staff to help me deal with the situation.
Speak loudly; Speak loudly
If I meet someone talking loudly in public, I will remind them to pay attention to their own voices and respect the rights of others. If they still don't listen, I'll ask the staff nearby for help.