I think that Sagittarius is a natural prankster, so I'm sure some of us lunar Saggies have pulled some good ones on our nearest and dearest.
I can't think of one big prank I've done off the top of my head, but every now and again I like to prank call my Mom. She falls for it all the time. The funny thing is that she has Venus and Mars in Sag - I think the flip side of our prankster ways is that we are sometimes gullible, at least initially.
So... got any good prank stories to share?