HD, it never bothered me that people were " eavesdropping". If it had done, I suppose that you could have accused me of hypocracy - since I spent several of my formative years "eavesdropping" on ATC as a spotter (initially VHF , & then HF - which became a passion). In fact, it was what encouraged me to become an ATCO in the first place ! I can see that there is the potential to misuse the technology but, overall, I have never seen any actual harm in it; & nowadays sites such as Flightradar 24 seem to have the potential for being used much more for the pursuit of various nefarious activities.