I think my parents have had their suspicions at times...but I only exhibit a few characteristics of the "typical stoner." Like I get good grades, never been in trouble, etc...and I don't bring any dumbass stoned friends home. I also make a point of it to ensure that my mom thinks I tell her everything (I'm generally very honest with her except about the weed thing) so my reputation works to allay any suspicion. But I'm not in denial about the fact that I probably do make them suspicious sometimes.