Yes, it is very risky and could cost them their job and a lot more but never underestimate someone that is desperate for a stop. If they work for a company that has a quota they very well could take a leap of faith and if you "get away" during the stop then you are guilty because now they don't have to recover the product because you could have ditched it anywhere. If the LP is unscrupulous enough to file a false statement that they witnessed concealment they are probably not scared to lie under oath and say they saw it should the case go to court.