The warning has recently been placed on the wiki page. This seems excessive without evidence. There are two warnings:
1. this design is not by Prusa, this is true but the design clearly decends from the sells/pruse mendel. Many other derivatives have been made and nobody is really confused. the designer is clearly stated in the infobox.
2. the design is too weak. This might be true or not but this is not something in need of the big fat red warning box. A separate section on issues with the current design is the right way to adress these kind of problems. There are even two solutions: make it in aluminum and build a prusa i2. the latter is a desision the person building a 3d printer, a comparison section might be usefull there.
For the record I have build a prusa i2 and am not planning to build an air2. Bitflusher 16:55, 24 September 2012 (UTC)