If this were a 19-year old dude with a 14-year old girl, we know what the reaction would be.
Exactly right.
First they are not classmates, unless the 19 year old has been held back for 4 years. They are schoolmates.
And Yes: if this were a 19 year old boy the same sheitheads who want to turn this girl loose would want to hang the boy by his balls.