Not doubting the poster but, surely ALL phones are banned by your company? Seeing as 99.9% of mobile phones have cameras these days I can't see that your company would do anything other than block ban cos otherwise they are going to end up with smart 4rses trying it on.
Do people really think companies have the time and resources to get someone to check ever day to see if a person has fiddled with their anti-tamper sticker they put over a camera lens.
I'm just amazed that so many people are coming up with these ludicrous work arounds to a problem which shouldn't even be there.
If you are not allowed camera phones then dont buy a camera phone and be expecting to use it. If I was the boss I certainly wouldn't allow ANY phone because the overwhelming majority contain cameras.