Re: "Bad" parenting or just different?
My son slept in a "punkin" seat for the first 6 months of his life. He had reflux and loved his seat. He ate in it (when we intro'd baby food/cereal) and enjoyed being in it. I don't see it really as being any different than mama's who put their kids in a vibrate seat to nap.
I do however think at that age the baby should be held to eat....