trading col techs/pop

[gravey101]

successful trading of colonization techs/population can clearly be a huge advantage in the game. Converesly if you are in a situation where you cannot do this (neighboring races are unforiendly/inhabit same world type/breath same atmosphere/already have made trade with another race, you can find yourself left behind. Clearly this is not all there is to the game, but I wonder if any hosts ever consider these trades to be unbalancing and ban them form their games ?