Im not a fan of the wireless log on / off idea.
As an engineer I have 5 different Davis Derby keyfobs on my forklift keys as they all do different jobs, a wireless system would just get confused.
The current system of presenting a fob to the reader & pressing the button to switch on works fine as it is.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.