Back in 2003 I took my son on a trip to Japan and Thailand. If you remember, that was when they were having that big SARS scare. Everybody was telling us not to go or to be careful because of the SARS. Well, we came up with a great practical joke...
I bought a few dozen of the painters dust masks, and everytime we'd take a photo, we would wear the mask. Soon I was getting everyone we met to wear a mask for a photo! It was great, looking at the photo's it looked like everyone in Asia was wearing masks.
The only problem is that now that now all of our photos have us wearing the mask. We have very few good pics of us from that trip. I guess the joke was on us!