Brett Farve's Dirty Crackback Block

It is bad enough the Brett Farve can't decide if he will retire. Now he is throwing a dirty crackback block in a preseason game. The question is will the NFL fine Farve?

Side note: the flag went down immediately after the play. Farve didn't even appear surprised. That is a telltale sign Farve knew his block was aimed at safety Eugene Wilson's knees.