Tamper proof screws are very nice to have on public places like toilets, because a small part of population can't resist temptation of the fasteners and tries to (un)screw

them on any opportunity.
Tamper proof screws on home appliances are twofold signals:
* There is nothing worth fixing here - ref. maintenance free batteries.
* Corporate has had it's share of lawsuits from boneheads that have tried to convert electric fan, toaster and chainsaw to something more entertaining.
But I have bought the whole set of tamper proof screw bits that has allowed me to change a cord to iron. Among others.
I used to train some people on safety on one product. I gave some tamper proof bits that fitted into some safety devices for maintenance purposes - only to those people that arrived into training and client trusted ....hope they did not hand them down as candies, because some people are designed to tamper with any and all safety devises that are protected to prevent them from killing someone. Which is hopeless of-course, because idiots are damn crafty. Therefore much products are made way more complicated than they really need to be if people who use then would use some common sense. But our society is geared to find someone to blame. Very few people enjoy being blamed and anyone who has been ever on court (or police for questioning) will sow those tamper proof fasteners like there were no tommorow.
Pekka