I fully agree with Joanne here that this question could have and still may serve as a great place for people doing google searches on the subject to come and get educated. There can be valid and useful responses, even to a question like this. I believe having reasoned discourse about such a topic is the highlight of an excellent community.
Sadly, the immediate response was to mock and deride the underlying beliefs that MAY have lead to such a question being asked. There was no consideration as to any of the potential behind simply answering such a question. What if the OP was looking for such a device to perform a simple scientific study of his own? Is that not a valuable endeavor, regardless of the outcome?
I've been a member of this community for a long time. Since the beginning. I have been saying ever since then that we need to ANSWER first, and debate the merits of a question later. Sometimes I think the SE community gets bogged down in the latter...debating the merits of a question. Early on in SE's history, it was an essential part of the process, to fully define the purpose of each community and set guidelines for what is absolutely on and off topic.
The amount of debate over questions that still goes on on many SE sites, instead of simply answering the questions posed, is honestly a little saddening to me. I can hardly ask a question on StackOverflow any more these days, as every time I do, the "SE Correctness" vultures descend and modify my questions, usually changing their meaning and obliterating my original question in the process, and immediately mire each one in pointless debate about how to properly write a question title or whether my question is really a question or not. I really don't want to see that mentality take over here on PhotoSE. Were not a primary technical community, were ultimately a creativity community, one that is very broad and has valid fringes.
We need to think about answers first, and merit second, unless the answer of whether a question belongs on this site has already been decided and the on/off topicness is clearly defined. Once answering, it's a simple matter to start a meta topic here and link to the original question if you really think the issue needs to be debated.
Finally, Under no circumstances should we ever stoop to the level of mocking or insulting other peoples beliefs. It doesn't matter what you personally believe, that is and will always be unacceptable.