So if I were curious…

We get Scientologists setting up a table near my local shopping centre most weekends, selling Dianetics and administering “stress tests” etc. And I’m morbidly curious enough to actually be tempted to speak to them and try it at some point, but the thing that holds me back is worrying just how quickly they might try and get their claws into me. Would they be trying to get my contact details off me right away and all that, or can I blag a quick go on e-meter without that?