how about, just because soemoen calls on an O.C. ing individual does not create a reason of PC or RAS, as a result there is no definite NEED to stop the individual, if engaging, BE POLITE, most legal O.C.ers will have camera's to document the encounter so there will not be any incorrect statements in the report that will be able to hold up in a court due to lack of evidence to the contrary, if this upsets your officers, then they should NOT be the ones responding.
also learn the difference between detainment and consensual, most will ask if they are being detained, if the answer is no, then that ends the consensual interactions most times, if the officer wants to persue he will have to state he is detaining them, or just let them go. it is recommended to keep a casual tone with the person beign detained and stay pleasant, describe the purpose of the stop, and why they are having to "investigate" however with a lack of evidence of a crime they will be restricted to constitutional laws and restriction if the person applies their 4th and 5th amendmental rights, they need to be prepared for this, and not look at it as an obstruction of their job, as it isn't sicne they are rights, and your officers are bound by them, and there are legal ways around them.
these people are very good at enforcing their rights, and dont' like them trampled on, so I guess the best thing is be respectful, be courteous, and of course there are some criminals out there, so be prepared by means of ballistic vests and sound judgement.