Comment by D-Machine

Yes, very annoying, we know from extensive work in psychometrics that single-item, binary / forced-choice items produce junk responses that are heavily contaminated with response styles (answer in most socially-desirable way, select closest response to mouse/finger, select same response as last time, select random response, etc). Just give people an out ("Diagree with the question / premises", "Prefer not to answer", "Unsure / Can't decide", etc) and make sure you have e.g. a 5-7 point Likert-type scale for multiple items, or up to an 11-point scale for single items.

This kind of site / demo does none of the above, and so can't even be trusted for directional effects (the direction of response may simple be due to the type of people responding, etc).