Well, its not exactly cheating since there are no real rules and there is no competition. However, dropping tanks is bad because it lowers the validity of the database.
Personaly I look at it as a personal goal. My winter tanks are always bad and I started out at 34mpg. I choose not to drop them because a) its just not the right thing to do, and b) it's what I got. I have raised it up considerably and continue to do so. Imagine how thrilled I will be when the long fight has finaly gotten me that star. I'm sure I'd appreciate it more than someone who selectively enters good tanks.
If you just want stars then here you go
