I think the anti-cheat is currently rigged to zap anyone who exceeds the cargo limit of their ship.
Could be worked around, but it would require a lot of work. You'd have to rig every ship to have times X amount more cargo space in the ini files but leave the infocard at it's current cargo space, and then regular commodities would take up more than one space so that you don't carry any more than what you usually would carry.