Taking this as an example, you'll notice that, in fashion you never go half-retard. Those baggy jeans work for the guy because he has long hair, a beard and is wearing some vintage looking sweater and a cap that probably marks his obsession with baseball. I bet he likes vintage motorcycles and has a lot of nice vinyls. If you have a dad haircut and try the same jeans with your button-down you'll end up looking stupid.
Is this post a joke? You need to know if it is ok to wear a sweater with a SC? Of course it's ok, better with no tie and a white bd shirt but doable with a tie and stripped shirt although a little busy IMHO.