Good. If it is not reliable, it's a further harm than good if it exists as a false security.

An analogous example: my local pizza delivery (where I worked) would shut the box with a safety sticker, to avoid tampering / dipping by the delivery boys. Now, sometimes they would forget to do this for various logistical reasons. Every one of the non-stickered ones started getting returned as customers worried a pepperoni stolen. They stopped doing it shortly after.