This is no longer in the new FAQ they just released V 4.1.1 which goes into effect April 2nd.There's already a rule in place for this issue. Page 5 of the X-Wing FAQ:
"After the Planning phase, if a player wishes to look at one of his dials, he must inform his opponent first. Manipulating dials after the Planning phase will not be tolerated."
Ask your TO's to clear this rule up at tournaments, and remind your opponents. If your opponent tells you before he picks his dial up, there's less doubt of his intentions.
God dammit FFG. Way to remove a core rule that limits cheating. I'm sending them an email to add it again. I would suggest everyone else does so too.
Oh my! Yes, this opens a can of worms, unless the rule is changed as I have suggested!
Not the way you suggested. The way it was before.