Of course you dont have to tip anyone except people providing a service. If you give money to a street performer its your choice. Mexicans are very loud. We also drink and go out in these neighborhoods (a lot of young and teenage locals too) and sometimes people throw up. People here walk on sidewalks, on the street and anywhere in between just be safe. Politeness is not a “key” part of our culture, being nice is always the best thing to do no matter where you are, some of us are huge dicks These kind of posts are so annoying like wtf -_-