If she is going on vacation this summer and you have a Temp coming in you could remove the whiteboard and & blame the, presumably now gone, Temp.
Even if there is no Temp, you could still use the vacation for timing: "Wasn’t it gone when you left? Huh. Well, we put this bulletin board (or classy framed knock off Art print) up since. Gosh we thought YOU had removed it or we would never have removed the whiteboard…"
Of course you could always go to her supervisor and say what you said here. She/He would have to be … er… a clown … not to see reason and have a chat. Sometimes the direct approach is not an option though & I get that it might not be worth the rep., tears secratarial anger that might bring you.
First, just surreptitiously erase it one day, and proclaim ignorance if anyone asks who did it. Then, wait to see what the kid does the next time he comes around. If he draws another clown on the board, go buy a clown suit and mask, maybe even a large plastic knife. Then erase the board again.
If you find out the kid is coming by again, get ready. Put on the clown costume and mask and hide behind something nearby. Now, this might be difficult for someone who hates clowns (and virtually impossible for someone who fears them), but the results of this will be very much worth it.
Watch carefully as the kid approaches the whiteboard. Watch as the kid picks up the markers. Watch as the kid begins to draw on the board. When it becomes obvious that he’s drawing another clown, and fully absorbed in his work, jump out screaming and growling and chase after the kid.
Make sure you plan out an escape route beforehand and a nice safe place to hide the costume, and that no one will be able to identify you when the fun starts. A lot of people hate clowns, and many seemingly fear them. Adding one more person to that list - the kid - wouldn’t hurt. >:-)
Or you could volunteer to babysit the kid some night, and rent a bunch of clown-themed horror films - It, Killer Klowns From Outer Space, The Clown at Midnight, Clownhouse… There’s a lot of them. (You can even tell the kid all about the guy who made Clownhouse, just for the halibut.)
If you end up traumatizing the kid enough, the secretary might even be forced to get rid of her collection of clown dolls, or at least never bring the kid to work again.
Please tell us what happens - I can hardly wait.
Observation:
Aren’t there a large number of people who find direct open communication waaay too difficult!
