I removed your examples.
you asked...
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what should I do about this? In my view, if someone at BBO looks at the evidence and decides there's simply no way that someone could play and bid so well without having UI repeatedly, I'd really like to hear that there's a way to get these people permanently barred.
The correct answer is to report it to abuse at bridgebase dot com. Do not post here, as you are violating the TOS. Why? It took me no time at all from your examples to peg the offenders. Since it was so easy to find them, you violated the rules of this site against public accusations of cheating. Even though I have removed your examples, I suspect anyone wanting to look back over a couple of weeks of your play, might find the pair in question. So perhaps I should not even allow the question, but I will with the edits I made. I will send you the full text of your message so you can forward it to abuse along with the names of the questionable pair.
The "cheating pair here", and it seems clear they are cheating, have never played in a single bbo money game. People like them are a blight on the bbo community. They will be reported to abuse, but here is the reality of the situation.The bbo does not require positive identification of a user (no credit card number, no bank account, not even a facebook or paypal account). Anyone can create a new identity in a few seconds. Permanent bans, under the current conditions, is simply not possible. We can scramble a users password, effectively killing that username, but you yourself have more than one username. So how effective is that? It is something we can do. There is a move to build reputations (maybe by length of membership) so that only people with long established relationships can play in certain areas, so scrambling cheater passwords would keep them out. That maybe the eventual solution to this situation.
WHEN players play in money games, they have to provide, among other things, a paypal account, a check, or some way to pay their entry fee. Here cheaters can be reasonably punished. Their money's taken away or not accepted in the future, they and their aliases blocked from all money-based games. Their points awarded removed, any prize they might have won (cash etc), not awarded. In things like acbl or other national events (bbo italy for instance), they can be turned into the national organization.
So in money events, cheaters can be properly dealt with, and there is an ACTVE ethics department on bbo that handles these type situations in rating point events. (The checking is proactive in those events, people not reported are often caught, people report are always investigated) The truth of the matter is, little is done about main room cheaters. Sure we have banned many, many of them over the years. They just don't stayed banned. But one thing for sure, they don't play in rating point events. Here is a suggestion.
1. play in bbo rating point events (not free of course)
2. play in team games against people you know and or trust
3. play in the few free tournaments where the TD's ban known cheaters and actively keep their game cheat free
4. find honest players and play against them in the main room or relaxed room
5. don't worry about the cheaters and try to improve your game.
I go with 2 & 4 myself, although occassionally 1. I also train with a partner against robots in relaxed room. Here we might make the players at the other tables unhappy, because we sometimes discuss the hand during play (related to signalling agreements, not what we actually have in the hand).