Most leagues take points away for fumbles. It would be interesting and fun to have a stat category that allows for points to be taken away if a player drops a pass.
Nicholas Montes commented
i like that idea if a player can get a point for a catch. than he should loose points for a drop.
A "dropped pass" is very different from a lost fumble.
A dropped pass results only in a loss of down.
A lost fumble results in a loss of POSSESSION.
Dropped passes are not an official scoring category in the NFL. There would be no statistical reference to use for scoring as a result.