[the_tyrant]

I used to install security systems, and I always tell the customer to change the password when I'm gone.

When I come back to check up a week later, they never do.

In fact, I can use some keywords to find the login pages of a few models of DVR on google, and because nobody ever changes the default login, I can always just login to view their cameras.

PS: same thing with the toilet really, it allows you to control it with your phone so you don't have to touch the remote control. But to make it easy for people to control, the toilet's Bluetooth password is 0000. Of course, some hacker will stand outside the washroom door, login to the toilet, and tell it to keep spraying at you buttocks.