Love 'em. Don't eat too many because pigs are almost-universally CAFO animals and have crappy o3 : o6 ratios. But they're typically fried in their own lard and don't have anything overtly poisonous in them. They're also typically very dry and heavily salted and I find they give me cotton mouth if I eat too many.
So eat away, but keep them a "moderation" food, for sure.