I think there are some valid points here. As I mentioned a few weeks ago, I am an occasional setter of thematic crosswords, and so I acknowledge at the outset that I am totally biased - please feel free to take my comments in that vein.
Fundamentally, this is a crossword help forum - and it is a free country. The idea of censoring the internet is somewhat terrifying, and it is hardly as if we are dealing with state secrets here (even those of us, like me, who treasure the Listener, amongst other advanced crosswords).
More than that, it is great that more people - who are obviously skilled solvers - are taking an interest in the Listener and are giving, and getting, mutual support.
I personally - and it is just my view - think that it's a shame that SO much information is given away in the questions; they could just as easily be asked/answered either privately, or more cryptically. The thread above pretty gives away all of the "fun" penny-dropping-moments, which is just a bit unnecessary. As a setter, I spend hours - many, many hours - trying to make sure that the penny dropping moments are a thing of delight - and it is really a bit dispiriting to see them just revealed casually.
For what it's worth, I'd feel the same about any "live" competition crossword. It's not that anyone's seriously in it for the prize (no point in trying the Listener if you don't own Chambers!) But the "PDMs" seem obvious when you've got them - but they're not obvious if you haven't yet, and it's a shame to let the cat out of the bag, and spoil the surprise, for solvers who want to come onto forums like this for a "nudge" or even just moral support without having the whole game spoiled.
These are just my thoughts - hope no-one takes offence. The key thing is that people are enjoying doing a great crossword. But (selfishly!) I'd ask people to at least think of the poor setter before asking very overt questions.