Just stop that right there OK. You're no more a controller than I am a gymnast. You've insulted members here who happen to have vast amounts of experience in many facets of aviation. You've been called out accordingly and now you're insulting my career field. There are several controllers in all specialties in more than one country here who can tell you exactly what happens when a pilot turns off their XPDR. SSR radar, plane vanishes, primary returns, still there albeit, no information unless the system tracks. Tower? I spy with my little eye. That's day one ATC stuff right there.
With asking to squawk standby, its much more "say again" and a whole lot less "you sure"?
You need to check primary? Check for the primary symbol. You NEVER needlessly degrade available information such as a secondary hit. Tell your unit chief hi for me. Maybe he'll get me an in into the sectors I work in real life.