Well, yes, "fool-resistant" would likely be a better term, but I've never heard of anyone using it. ;o)

I used it in the same context as "bulletproof", which is only accurate if standard/average bullets are used. Even armour plating isn't proof against armour piercing rounds, and whenever better armour is produced a better bullet will surely follow.

All anyone can ever hope to achieve in any given task, is their own personal best under whatever restrictions are placed upon them - such as time, money and the involvement of other (possibly less perfect) people.