Although I don't think it's necessary, the detected starers will be asked if they were actually staring at me. OK?
Unfortunately not OK. Unverifiable assumptions, subjective opinion and/or hearsay simply aren't acceptable evidence:
A: "Over there - did that guy just stare?"
B: "Looked like it, but I'm not sure, let's ask him."
A: "Excuse me sir, did you just stare at that man?"
C: "No, of course not... well, I did look at him, but I wouldn't say I was staring."
D: "Oh he's always staring at people, then looking away..."
C: "I do not!"
A: "Hmm, do we count this one?"
B: "I don't know - put it down as a 'maybe'...no wait, make it a 'yes'."
What I meant by then was the unnatural/acted/simulated/passive staring which I can't detect.
Which we can reliably and objectively distinguish from 'natural' staring how?
The staring that doesn't happen on demand is natural by the definition, and certainly it's internally motivated.
Would that include someone gazing at the back of your head, daydreaming or thinking about something else?
Amongst other things, a good protocol doesn't rely on promises, opinion, interpretation, or guesswork by the subject(s) or experimenters.