Bluesky, you will note from the Thread starters own post that he got similar responses to Chevvrons on other Forums. It would seem Chevvron is not as out of step in the UK as you seem to think. LMX is conducting an online survey! That is, by definition, a sweeping generalisation and Chevvron answered in kind.
As for the information being "hardly the most secret or potentially damaging in the world", there are rules my company requires us to follow regarding talking to outside agencies as well as laws governing listening to and rebroadcasting air ground communications (see sticky). These rules and laws are there because individuals are very often totally unaware how much damage their actions can cause in the wrong circumstances.