keeping a vibrating butt plug in place (yeah, THERE, Weisenheimer) than a nonvibrating one? Yes, some are not designed to be "worn like clothing) but to be played with, moved around, by self or partner (hey, that's MY ass plug, buddy! Get yer own!!). But walking around with a vibrating asshole is mobile masturbation! Do I need a thong? Do I need my head(s) examined???
Vibrating is definitely harder. A tight fitting thong helps. I've often wondered if others could hear the vibrator buzzing while it was giving me so much pleasure.