Thanks to the magic of the internet those of us too young to remember this public service announcement (and several others such as this 1979 drunk driving ad) have the opportunity to bask in it’s glory.
Is there any other character that would have been better suited to this role than C3PO? Like ANY other character? That gold plated nay-sayer is the essence of uncool. C3PO is a worry wort, a fussy budget, the ultimate tut-tut machine. Anyone who has ever laid eyes on the original trilogy can tell you that without a doubt, no one ever listens to C3PO.
I can only assume Han Solo was backstage during the filming of this commercial simultaneously smoking ten cigarettes.