Regular hotel users, such as aircrew, flight attendants, pilots, and business people, might think they are safe and secure in their hotel rooms at night, but the privacy door locks provided can be defeated in literally seconds by hotel staff or anyone with the 'know-how'. This knowledge is freely available online, and many are unaware of the risks involved. I have designed products that fully block the ability to defeat these locks from the outside, closing down the vulnerability and preventing any gaps through which to break in.