Request for explanation, please

[Possum]

In the long sticky thread above, about the Race to SE5, Tournament of Champions, there was an exchange that was partially edited out.

Slynky said

I would have preferred it that way as well, Roanon, but considering there was no way to stop it with a game setting, it was something that a person had to do because who wants to be the only one NOT doing it, eh?

The controversy seemed to center around something to do with trades.

Can someone please explain to me, before I go back to playing on PBW, what this issue is about, please?

Not the personalities, not necessarily this specific incident, but the issue behind it. What pernicious practice is taking place, that can't be prevented with a game setting?