Dida should get a three match ban at least for trying to cheat.
It's pretty obvious he's hoping to get the same result they did against Inter when Milan were awarded a 3-0 win.
For trying to cheat so blatantly, 3 match ban is the least he deserves.
It's Milan though, so no action will be taken against him.

In fact, UEFA will probably give the 3 points to Milan and ban Celtic's fans from travelling away.