OT: USB stick with write protect switch?

[Amedee Van Gasse (on Ubuntu mailing lists)]

On Sat, October 10, 2009 18:29, Frans Ketelaars wrote:
> On Sat, 10 Oct 2009 09:13:44 -0600, drew einhorn wrote:
>
>> The convenience of booting from a USB stick is great!
>>
>> It would be even better to be able to flip a switch on the stick and
>> making it a read only device!
>>
>> Anybody know of a source?
>
> This one http://www.newegg.com/Product/Product.aspx?Item=N82E16820141488
> has a write protection switch .

Can anyone confirm that these "hardware" R/O switches always work in all
circumstances and that there is no way whatsoever that software can ignore
the write protect?

Because I have read once that it was possible but I forgot to bookmark the
source.