Yep, and many other teams, and driver champions, can be implicated, insinuated, implied, and inferred to have cheated or had irregularities in scoring and penalties. The playing field actually remains the same, throughout F1 history. With rare exception, most of the Great Ones have been arrogant and ruthless. It's a common denominator.
Schumacher is definitely one of the Great Ones, and the sport, on the whole, has benefitted from his participation.
The curious question remains, what will he be doing in '07? '08? DTM? family Kart track? Buying his own country? He certainly has not begun to fade as a driver...