There will always be disrespectful people, people may yell at you, flip you, ignore you..... so what do you propose to do about that? Give them a lecture? Tell thedisprespectful cashier at the checkout counter that you expect them to respect your boundaries? Good luck with that.
Yes, Angel. It doesn't work all the time, but you CAN -- with practice -- learn to lay out, and enforce, healthier boundaries in your life about how people treat you. Absolutely you can.
This does NOT come naturally to me, as I am naturally a "pleaser", classic 'Mr. Nice Guy' personality (hey, no jokes here, I really am!)... but I've had to work at it. I come from a long family line of co-dependent pleasers, complete with a lot of alcohol and other substance abuse problems that tend to go along with our personality types.
But yeah, it absolutely CAN be done. Over time, we TEACH people how to treat us.