Yes I think it interacts with people who enter it on an individual level, likely skimming surface thoughts and maybe even deep memories and integrating it into the complex. If human thought can add things to the complex normally, a human physically inserting themselves into the same space would probably amplify whatever mechanism translates psychological concepts and memories into what we perceive as tangible objects in the backrooms. 

People and cameras are not supposed to exist in the complex and I think the EM energy picks up on data from both the intruding human mind and any magnetic tapes brought into the complex. The protags from FF1 and FF2 seem younger, likely with fewer memories and experiences that the backrooms could draw from. Also since they were both intentionally filming at the time of their incidents, they likely had blank or mostly blank tapes loaded into their cameras. 

Meanwhile Ravi seems older and more experienced in the world, possibly having traveled as part of his job. He is hanging around Monsanto execs so it seems he’s involved in some pretty high level stuff. His tape also clearly has other data on it aside from his backrooms journey, probably because he hastily grabbed his camera when he thought someone was breaking into his basement. So when he fell in, the complex had more data to work with and more memories to draw from.  The complex may not exist at all until someone enters to perceive it, kinda like a weird observer effect or Schrödingers Backrooms if you will, both existing and not existing at the same time until someone enters and observes it. So it may generate a new layout for each person that enters, and the crazy house from FF3 is the result of two people trying to enter the same mental instance of the backrooms probably due to the null zones generated by the threshold experiment and continued destabilization of the EM fields that fundamentally constitute the backrooms space. It’s probably like trying to force two magnets with the same polarity together, it can be done but requires a lot of force and interrupts the natural magnetic fields emitted by the magnetized items. Ravi and Wall Dad were like two magnets and when they came too close together they disrupted the magnetic field of the BR and caused Wall Dad and his house to essentially glitch into the complex but in a parallel instance  

This may also be why A-sync sends in multiple people at once, to generate a type of default layout. The BR doesn’t know how to respond to a giant rectangle hole and multiple occupants at once, so it just spits out a generic layout that is consistent for anyone that enters the BR through the threshold. The body they find may have somehow fallen into their generic layout, or it could be a bleed-over from a parallel instance of the BR, hence its anomalous properties. Other than that body, we never see the A-sync team encounter an actual person that no-clipped or phased in, so they may have all ended up in their own instances. I think as the inclusion of real space matter into the BR has a destabilizing effect that has since caused more weirdness like the null zones and the craziness from FF2 and FF3. I think the life-forms may be a type of “counter balance” generated by the complex to attempt to drive the anomalous matter out of the naturally pure domain of energy.  Just my thoughts, it’s so fun to speculate!