There is another rumor going around that Cole is a drug user. This rumor came from someone who has sibling and his/her sibling has friend who goes to NYU.
Not relevant at all. First, that person doesn’t know Dylan or Cole personally. Second, he/she heard it from his/her sibling’s friend? Still not convincing.
Anyway, I’m pretty sure that Dylan won’t never ever let his own twin brother to use drugs. Think about it.