The tales about finding sneaky -- and very illegal -- voyeur cams in Airbnbs are far too real. From couples in California ...

Emma Fierberg: I'm looking for the camera. Is it on the doorknob? Michelle Yan: It's not on the doorknob. Michelle Yan: So, we got our hands on some spy gear from Amazon. (These are so tiny).

These apps are typically free or cheap ... which is a legal issue just like an indoor spy cam. Yes and no. The owner of the Airbnb can keep cameras that monitor the outside of their property ...