I would like to know what security risk or privilege is at stake with me using a password that last 48 hours. The password can be for either network the Conference or Guest Wifi.

Remember, all I am doing is connecting another device to WiFi that I get for free as an elite.

I have been staying in Marriott long enough to remember that we had a specific password during our stay. That evolved to enter your last name and room number. Now, as an elite I do not see anything like that since Marriott remembers my devices.