Talking to random strangers is stressful and draining to me so I avoid it. I always have my big bulky pair of Sennheiser earphones with me so if somebody tries to talk to me I pretend I don't hear them and keep listening my music, audiobooks, games, or whatever else I am doing.

I personally couldn't care less if people think I'm rude or some type of racist or whatever; other people's opinions mean nothing to me especially if that person isn't benefiting me somehow.