[matmat]

pran, on 2010-October-30, 16:21, said:

Presumed dummy may call attention to a face down opening lead by his LHO or by any opening lead (whether face up or face down) by his partner.

He becomes dummy at the moment an opening lead by any of his opponents is faced.

I would rule that if (no longer presumed) dummy is the first to call attention to a faced opening lead by his LHO then declarer must accept this opening lead out of turn by analogue application of Law 54C since dummy's action can imply information to declarer similar to declarer having seen one or more of dummy's cards.

What's to stop an unethical player from pulling off a stunt against an experienced player (LHO) and a noob (RHO) whereby they lead out of turn intentionally to make the novice, who might not notice the lead out of turn, declare?

[Bbradley62]

matmat, on 2010-November-10, 22:32, said:

What's to stop an unethical player from pulling off a stunt against an experienced player (LHO) and a noob (RHO) whereby they lead out of turn intentionally to make the novice, who might not notice the lead out of turn, declare?

How would that work? Novice wouldn't become declarer unless experienced player also wasn't paying attention and tabled his hand.

[bluejak]

In general cheats get away with their cheating for a time, but they get noticed and eventually dealt with. The punishments for cheating tend to be severe enough that most players will not try it even if they are of the mind that would consider it.