I definitely do - it's all in the inflective of delivery, varying the tone and depth of boo, and how you use both your mouth and nose to affect the way that the boo resonates off whichever stand you happen to be booing in
It's a fine art - the level of booing I direct at Morgan, Simpson and Chilwell when they make yet another feck up that costs a goal, for example, is deep and hearty, and lets them know that I love them but I wish the feck they'd stop defending like complete pussies. The boo I used to direct at Craig Levein, however, was more high pitched and slightly whiny, making sure that he fully understood I absolutely hated his feckin' guts and wished he would piss off as soon as as was humanly possible.
I didn't boo at O'Neill, but like BN I would have created a new and unique sound which would have made it quite clear that I knew he was roughly on the right track, but could he please get them to play with a bit more effort and go and sign Muzzy Izzett to help them get promoted. Whatever BN managed to create on that day clearly worked, so there's a lesson for us all there