The first time I smoked I used rhoto's, because all of my friends we're saying "dude, you're eyes'll get REALLY red so use these to make it not happen"
Second time I smoked, I looked sober as ever, but was high as shit.
Now when I smoke, I usually get... maybe like one sting of red across my eye's, and I can pass it off as stress.
Plus, I'm so good at staying focused when I'm high, I can bull-shit my way through any inquisitions.
But I must say, Rhoto's rock!