Having read the consent form and such, I don't see any problem with participating, and have enabled the tool. I would encourage others to do the same. The study is able to progress with a few seconds on our part spent installing the gadget. I would note recent Village Pump discussions on the tool: < http://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)#Wikipedia_in.... To summarise what has been said there: with concerns having being raised there, the tool is now hosted on Wikipedia, and so users are able to watchlist the gadget page and scrutinise any changes to the code.
AGK