Some of the so-called dirty tricks don't sound so dirty to me, like the infamous memo that states, "If you are having second thoughts about your candidate - Don't vote on the first ballot" which has now morphed into rumors that so-called Stop Iggy groups are urging Ignatieff delegates to go into the voting booth and yell at the top of their lungs that they hate Ignatieff.
Lots of allegations are being made with no proof. This is just a tricky way to smear the person you're accusing. If you have proof, give it. If you have no proof, I'd say you should be very careful who you accuse.
Here's an example. Posts like this one are outrageous, and the guy doesn't even allow comments. Not only does he provide no proof, but he claims that organizers are doing this. In fact, he implies that Bob himself is directing this. Come on. Supporters might get up to shennanigans on their own, but Rae organizers have stated publicly and very clearly that they do not want their supporters to do anything dirty.