Now that I work in a public institution and not a private company, I've been going to the bathroom a lot in mass public bathrooms; row after row of stalls, very high-traffic, and considered to be dirty or unclean.
At any rate, after a good solid minute of beeps and at least 45 seconds of shocked/amazed/irritated looks from the other patrons, I managed to disable the system beep and got a light applause from someone in the back of the Cafe amongst a myriad of grumbling. In case you have not clicked on the link I'll describe the basic steps: