I've always seen "Stoner" as a derogatory term, too. Mainly to do with lethargy and wastefullness. Shit, I love to get whacked out of my mind during the day, if i can, but it's mostly at night, with friends, where we actually have a good time, even then, it's no more than once a week.
This, compared to using it as an escape from the world, or a way of accelerating time
I've known a few people that fit the derogatory term perfectly, that essentially did nothing throughout highschool, save for get fucked up, their grades matched their attitude.
Personally, i'd say no. I enjoy using the substance, but i don't abuse it