whiplash2411
No, banning would be a bad idea. This is a forum for users to discuss their doubts and get them answered by fellow users or experts. At the same time, it's unfair to other users who might see a question posted without source and find out the answer and answer it by memory on a test, only to get an unrealistic score.
I am talking to bb about making source tagging compulsory. We'll see.
There may be case in which the The guy doesnt know the OA,yet he wishes to have the explanation.But,the source is something that the guy will always know,whether he found it in
MGMAt,Gmatprep,Gmatclub test,knewton,kaplan.Some people find ( "orphan" questions / without the source ) on a similar forum such as BTG and when he is not convinced with the answer , he posts it on another forum such as gmatclub and vice versa.There are bound to be loopholes but the idea is undoubtedly good.