Comment by hannasanarion

> Further, research that involves deception is also considered a perfectly valid form of research in certain fields

The type of deception that is allowable in such cases is lying to participants about what it is that is being studied, such as telling people that they are taking a knowledge quiz when you are actually testing their reaction time.

Allowable deception does not include invading the space of people who did not consent to be studied under false pretenses.