It is clear that the problem was created from not having been careful to name something dangerous like radioactivity with the same prefix used for radio technology, harmfull or not. (the same concept applies if we use microwave transmissions because people would think their body would be boiled).
Regarding radio transmissions' safety, I have been dealing with this multiple times, and the problem is that people don't worry about where they place APs or ISP routers with embedded wireless at home. They don't care about carrying smartphones on the pocket (using WiFi, BT or NFC), using baby monitors or security cameras at home. Maybe they don't even know that their microwave ovens could be leaking radio signal due to improper use of the oven's door during its lifetime. They only complaint about enterprise wireless because it is imposed. We live on an era where people's lack of knowledge on a specific matter is filled with non-scientific information from unreputable resources, and presenting scientific evidence to them is so hard to understand, that people tend to think "that's they want us to think". At the end it is best to show people common activities involving the same radio signals with greater or same impact to their safety.
Your only concern here from a technical point of view would be to place the AP on a "safe" distance from all kind of stuff that sit on a desktop such as printers, monitors and other IT equipment that could obstruct the signal and impact propagation.
Placing an AP over desktops also increase radio signal obstruction from human body, so decreasing signal range.
