It's bad enough what they go through from people who think they're better than they are (hint: you're not any better because your parents raised you in something more socially acceptable). It's clear that you don't know what it's like for them, but if you did you wouldn't make comments like that. If every day you heard people driving by yelling things like "trailer trash" at you then you might understand what I'm saying. Spread your subtle hate elsewhere.
Sorry to others for this long rant about a small, unconscionable remark. Condescension is a personal pet peeve.