integer allow;
default
{
touch_start(integer num)
llAllowInventoryDrop(allow = !allow);
llOwnerSay("llAllowInventoryDrop == "+llList2String(["FALSE","TRUE"],allow));
}
changed(integer change)
if (change & CHANGED_ALLOWED_DROP) //note that it's & and not &&... it's bitwise!
llOwnerSay("The inventory has changed as a result of a user without mod permissions dropping an item on the prim and it being allowed by the script.");