It might also be to deter those who might poach information from here and then re-broadcast it as their own - without giving credit to FC. Such people would usually contribute absolutely nothing to the site.
However, I can see that any unscrupulous new members (and I'm not
saying that we do have any) could just post meaningless "garbage" contributions just to get their "post count" up.
I do have a bit of sympathy for people like "Horty652" (two posts above). However, if such members do have the time to log in to the Forum and read everything, they should also have the time to be able to log into, and casually monitor, radar tracking apps (like adsbexchange.com) and then, who knows, they might even be able to contribute something pertinent. I do not think that they really can hide behind the "I haven't got the time or the equipment" argument. There must be a lot of members who have to allocate their time between work, family, pleasure, hobby, etc and manage quite successfully to achieve the right balance. Sorry, Horty, but I think that it a case of each of us making the most efficient use of the time available to be spent on our hobby.
Just my thoughts and not intended to be a slur on any existing members - new or not so new.