exactly.. isnt it possible that any regulay user will just enter the password thinking its just another script? .. and just settings the x bit will make it executable. so any novice user would think its just another program which wants permission.
there is no cure to Stupidity.
This is like One night Theif comes to your house, find the door locked.
then you come & give him the keys
then he steals & runs.
You say, the lock is not secure
If a user is stupid, then let him face the consequences of stupidity, one should not pity on him.