My yard is so small that I have to pull any plants I didn't plant myself up. We have bad blight here, too, and I have been advised not to let those volunteers grow, they can harbor blight. I imagine Florida is very different than NY though.
We have two kinds here, early and late. Early is unsightly but harmless. In late blight, the entire plant turns brown pretty much all at once. It stops producing, and the blight stays in the ground or in the foliage for next year. I don't put any of my tomato foliage in compost, but bag it all up and get it out of my yard immediately, whether it has blight or not.