I've heard the suggestion more than once... That we should film our students without their knowledge in order to show parents how their lovely little darlings behave. We all dismiss the idea as a possible violation of their rights, but not this lady, and now she's getting into trouble over it. In looking at the article, I thought it was supposed to be "underhandED" and not "underhand", but anyway...
I'm seeing a disparity between the rights of teachers and the rights of their students... Students often secretly record their teachers in order to amass proof of unprofessional behavior. The evidence is brought to light, and the teacher is disciplined appropriately. However, should a teacher wish to do pretty much the same thing, he or she is treated far differently. If the video isn't posted on the Internet or shown on the local Jumbo-tron, I fail to see the real problem.
I am aware, however, of the fear of opening the door to violations of privacy as more and more cameras are pointed in our direction, but if limitations are placed on their use (ie. if a teacher feels the ongoing conditions in the classroom are potentially dangerous and he/she has exhausted all other means of behavior modification and the filming is the next step in the whole process as a means of documentation that can not be argued by subjective parents), then I think it can be used within reason.
People always jump to conclusions that each open door will lead to an inevitable floodgate explosion, but with well-worded legislation, limits can be made. It isn't always an all or nothing situation.
If you do get sick and tired of feeling like a victim of the paparazzi, do what I do and give them a little dance routine. If anyone IS actually watching, it should at least brighten their day a little bit.