Wannabe Scholar said:
Turning A'Sharad Hett, a Tusken Jedi, into a Sith Lord.
The funniest thing about this (read, stupidest), is that when A'Sharad first made his appearance in the EU, his lightsabers -- both his own and the one he inherited from his father -- sported red blades. Once AOTC rolls around, though, his lightsabers become green without any explanation. Then he becomes a Sith, and he's sporting red blades again.