'Nice' is relative. If people mind their own business and refrain from attacking me ... that's "nice" enough. A Glock can help smooth out rough situations I'm sure. I don't have one so I travel with a good friend ... like Sam Colt, Bill Ruger or my buddies Smith and Wesson.
My "be nice" self defense tool is Italian. EAA Witness in 10mm flavor. I have others, but this one seems to follow me around a lot.