::laughs:: I think I'd like your father!
My first husband always ate half his dinner with his spoon. He had terrible table manners anyway -- ate with his mouth open, hunched over his plate, blew his nose frequently and loudly into his table napkin... Really, using his spoon to eat his peas was the least of his problem.
Myself, if I were eating with you and your table manners were otherwise good, I might not even notice your eating veggies with your spoon. I'm not super-observant, and I try not to scrutinize my fellow diners as they eat. But it really isn't right, and any book on table manners would tell you so.
That said, I use my knife to 'push' roll-ey food such as peas and corn onto my fork. This isn't 'right' either, in the strictest sense, because the use of the knife as a pusher is a European custom, apparently, and, otherwise, I use American table manners. So there you go!