When people actually realize that this is allowed, they will definately pass these around, at least a little bit. The German scores were a result of that, which is fair enough - rules apply to everyone, and they didn't do anything wrong. Then, if this becomes the norm of every team, send the best CPU of the team to the guys with 4 HD4890's so they can take a record or two, will it still be OK?
The problem is that "abuse" is hard to determine. Is it if it's shared between 3 or 4 members - or does it take like 15?
Perhaps it's hard to create a rule without making moderating a PITA, but some guidelines about what's fair and what's not wouldn't be so bad If nothing is written down on the subject, any user will have one opinion about what's unfair and what's not.