Earlier quoted context omitted.
So you want low rep users who don't understand the expected quality for the site to be answering questions while the high rep users who are familiar with the duplicates and expectations are prevented from helping? Preventing high rep users from answering _good_ questions from low rep users means Jon Skeet and Eric Lippert won't see them and be able to give their often spectacular answers. You're suggesting cheating l…
> How many more answers to How do I fix a null pointer exception in Java ( http://stackoverflow.com/questions/linked/218384?lq=1 ) do you want to have on the site? Honestly. You're looking at a non-problem here. The endless stream of trivia questions is rivalled 10 times by the furry of downvotes and closing. Beginners who dare asking questions like that are welcomed so badly that they usually don't dare coming back.…
Like I said in another reply, I'm not saying block, just filter by default. Though, perhaps a time limited block would be useful, and solve another problem: experienced users know how to answer quickly, and often do so before new users get the chance to provide one.