To be honest, I’ve never had an issue with trading between houses. It’s normally fairly obvious what is okay and what is not. In the odd occasion where you do get stopped most people will let you off with a warning but if they do fine you it tends to be 2-5mil which isn’t going to upset many people. I agree with Laz that maybe if we automated it then it would be easier but that’s another thing that will take time away from the developers normal duties.