I was born and largely raised in TX to parents who were both born in AR, so I also grew out of the hillbilly/redneck family tree (just a slightly different branch than you Appalachian guys).

Overt insults might certainly trigger some flak, but most of the people I know would be more likely to simply politely smile and nod (maybe even with a "bless your heart" thrown in somewhere, context permitting), all the while resting securely in the knowledge that the "opposition" has grossly underestimated their intelligence and thereby conferred a significant tactical advantage! (Of course, if you notice the error of your ways and can tone down the smug provincialism and be nice, then all will be forgiven and you will still be welcomed at the BBQ.)