One thing I hate is that bots CONTINUE to win the progressive jackpots that are high and this is very well known, that I have seen the last 3 happen when the bots come in, it gets hit and all leave. It's really unfair and should be stopped. If you can't do that in a real casino, why are you able to cheat the jackpot online?
But you can do this is a real casino; any machine with a progressive pot will become +EV at some point, and there are players known as "advantage players" who will wait for that to happen, and only play machines where the progressive pot is big enough to give them a positive expectation.
They will keep playing until they hit the jackpot, or until someone else does - and then wait for it to build up again.
Is this fair? That's hard to say. The advantage players make a profit over time. And that profit doesn't come at the house's expense. The house makes a profit over time too. So who is paying for the advantage players' profit? It's the regular players. The ones who play the machines when it's -EV to do so. The suckers who fill the progressive pot to make it worth the advantage players playing.
It's funny - I was just talking to someone earlier today in the Just-Dice chat about this, and then I heard about the drama over in this thread. The guy in the JD chat was suggesting that we should offer some kind of progressive pot. I said I didn't think it was a good idea, because it would cause exactly these kinds of problems. The "smart" players wouldn't play until the pot got big, and then they'd play until they won it. The net effect is a bunch of coins passing from the regular players to the advantage players.
So what's the answer?
My answer is not to offer any progressive pot games.
The problem is that people like them. They like to see a huge jackpot available for winning, even if they have to fund it themselves bit by bit over time.
I don't think that bot-detection is the answer. The bot authors will find ways to avoid detection. You'll be setting yourself up for a never-ending arms race where you try to prevent people from playing on your site and they find ways to play anyway - when people playing on your site is exactly what you DO want.
From what I remember of BVC(*) (it's been a while since I had time to play), players have an option of whether to contribute to the progressive pots or not - so the solution is already in place. If you don't like the bots sweeping in to pick up the big pots, don't feed them by filling the pots for them. Play without contributing to the progressive pot and the problem goes away.