Sometimes, however, the offense is so outrageous, that I just have to say something. Below is such an example from an on-line BBO tournment. But frist here are some ground rules I would like everyone to follow if they want to discuss this hand.
First, and foremost, I didn't play this hand so don't waste your time trying to figure out who was who by searching hands I played.
Second, if you recongize this hand because you played it, don't mention that you played this hand in your reply (if you do, I will delete your reply and block your ability to post in the BBF for a few days and double raise your warning level), as people will then be able to use myhands and find the hand and the guilty (?) party from that. And anyone posting the names of the E/W players will find their post deleted, and themselves bannished from these forums for a month. My intention is not to publically humilate the offender (although clearly he/she deserves it), but rather to point out what seems to be clear case (at least imho) for illustrative purposes.
Third, be assured that I have already discovered that this hand was in fact reported to abuse@bridgebase.com, as it should have been. No doubt East on this hand will have to answer for his/her actions and will be dealt with properly. (who knows, their redouble may mean, precisely, I have about 20 hcp, singleton other major, huge fit for you first suit, first round control in their first suit, and tripleton honors in the unbid minor...yeah, right).
Fourth, for the record, the NS pair correctly reported this auction to the TD at the time it occured. What would you have done as the TD?
West North East South
1♦! 1♠ Dbl
Rdbl 2♥ 4N 5♥
6♠ Pass 7♠ Pass
Pass Pass
As you can see, East 1♠ overcall was fine, but after his parnter's redouble, he essentially bid 7♠ on his own. He may as well just have overcalled 7♠ with his absolute minimum hand for a vulnerable overcall.
Now I give people the benefit of the doubt on some very strange auctions. Let's say EAST overcalled 1♠ on this auction and WEST decided that 7♠ would have some play against all hands his partner would overcall on, and so, without investigation, jumped to 7♠. You and I would have used blackwood, just to be sure partner has the ♠K and ♥A, but I wouldn't question the decision to bid 7♠. In fact, if opponent opened 1♦ partner overcalled vul and south made a negative double and I am looking at 19 hcp, I would be sure that north psyched making a 7♠ bid not that bad an idea (but again, I would check for keycards).
So if cheating is on the rise, how can you help?
1) Help stop others from routinely cheating. If you strongly suspect cheating, report extremely odd auctions to abuse@bridgebase.com along with a link to the hand in question. IF we all did this, anyone cheating a lot will therefore be reported many times and eventually, caught. If this was occuring, people would be much less likely to try to cheat.
2) Don't fall victim to what I guess I would call inadverted mini-cheating on your own. That is, don't open an instant messaging system and chat with your partner during play.
I suspect this second case is probably the most likely form of what I will call inadvertent cheating. Imagine EW above with chat on... and EAST overcalls 1♠ and south doubles. WEST looking at his hand, says something to his partner like...
WEST > omg this unbelievable, everyone is bidding and I have half the deck....
Now, west may not think that much of his comment, after all, he is going to bid like he has half the deck later... so he thinks this is not really an informative comment. And East may not think he is taking advantage of unauthorized info, his partner did REDOUBLE after all. But I think innocent comments (well, that one wouldn't have been innocent) in MSN messenger are the source of a lot of problems.
But here is example of what I think is more likely going on. Imagine, you are about to open and you ask your partner in ICQ, "do you play flannery". Partner replies, "no", and you then open 1♥. What conclusion will your partner draw from your bid? (and I saw this once, four or five hands into a game, a player wth ♥ and a short ♠ suit about to open light in the third seat asked is partner in public chat "do you bid if he plays flannery?" His partner said no, and 4th hand with ♠'s choose not to overcall 1♠, and they never got into the bidding after that. Cheating? Coffeehousing? Just slow getting system developed? BTW no other what you play chat for a few hands before and none after this question).
So I no longer believe Ron's view is right. If I see suspected cheating, I will report it. I hope others follow this lead. Let's try to make it hard on the on-line cheaters.