Sometimes, for example in an accident, the admin is forced to give a penalty to a racer, but sometimes hat racer can be left wondering why he got such a penalty, because all he sees with the penalty is a stupid "Given by administrator" message. This could be solved if the admins could state reasons for the penalty.
Example of command:
/p_30 playername Dangerous Driving
Instead of the usual "Given by administrator", it would appear "Dangerous Driving" or "Given by administrator - Dangerous Driving". This can prevent a lot of flaming in the future.
I dunno if this is actually a good suggestion, but I personally think this should be implemented.