These posters appeared on signboards in the vicinity of Table Mountain and around the South Peninsula. They featured Bokkie, with a single big tear rolling down his cheek, and the words 'Look what you've done! Bokkie says "Only you can prevent forest fires."' I was a terribly sensitive young thing, so seeing one of these posters always made me very sad...
I know of only one that still exists, somewhere near Scarborough if I remember correctly - or at least, it did last time we drove through there. If you know of any others, let us know by leaving a comment.
I spotted this miniature stylised version of Bokkie at the Montebello Design Centre, and bought it to hang on our Christmas tree.