most cases are accidents Dave - heat of the moment stuff - and being able to prove intent to interfere is hard. I would suggest that moving a T box is intentional interference
racking the bike in the wrong place is not unusual (usually beginners) and provided there is still space for the incomer to rack theirs, then is that "unsporting impedance"?? probably best to give beginners a verbal warning, experienced guys a penalty, intentional interference a straight DQ. but usually the official needs to see it happening to make the call - after the event is harder to regulate.
Edited: 25/04/2012 at 15:36