I don't think they should be advised to video the FLIR output if they stumble across something.. Like they stated in the pdf, its analogous to a no knock search.. They used the example of open curtains, and a cop would not be allowed to videotape anything they observed through that window without a search warrant.. By current laws, that would be a crime in itself, not merely grounds to exclude evidence..
I love the contempt the person that wrote that shows towards the SC though.. Its adorable..