Unfortunately “protecting” the forum is a hiding to nothing; you need new posters to ask (usually) intelligent questions – without that input, it will deteriorate and die off.
Plus there are plenty of people whose interest (or tolerance!) to contribute will wane, just as we will get new contributors like Alexpo and Papillion joining.
On the point of anonymity, it is an important part of the forum for many reasons, and even if done away with and a linkedin or other profile was needed (which would stop many people with a sophisticated understanding of social networking from contributing entirely) it could so easily be got around by setting up a fake profile from which to post, so that won’t work either.
You only have to see the many and various handles here which have popped up under new – or sometimes co-existent – handles to see that wouldn’t work.
It’s really a forum for entertainment; I’m amazed people take all this so seriously!