The more humorous part is that when you read a FLIR manual it will normally include instructions on how to properly use them to detect someone's internal body temperature which is what you would want to do when trying to find someone with a fever. In order to get the closest approximation of the internal temperature you need to get a reading from the tear ducts of the eyes. Now the first problem is I seriously doubt most people that are going to be using these cameras or even the managers that buy them will ever bother to read the full manuals. I read one cover to cover because I"m a bit OCD when it comes to manuals, most people aren't and most will just use the quick guide on how to use the camera and never bother to look at the shortfalls of it which are always like the bit on tear ducts, buried in the fine print.
And as you pointed out when someone has been out in the hot Florida sun, especially if they have dark skin are going to show up hotter than you would expect. I could see Disney getting sued if the sue the cameras because it could easily end up being racially biased.