It might be difficult to find the balance between giving away trade secrets and giving up on community support especially as managers tend to be on the more afraid side.

I think so far I managed to participate in discussions and ask for help showing code snippets that were stripped from any indication of where they are from (so not to give away information) and without any code specific to that business. This saved a lot of time to me an a lot of money to the clients so I can even explain to managers why it is in their best interest to let me talk about that in public.

Sometimes they even agree :-)