The problem I see in the religious world is that of con. Getting people to believe that what is not authentic Torah really is. This I see is the ultimate reason for the fact that the Gra signed on the letter o excommunication. But it also explains why so many people ignore it. Because we are all more liable to being fooled that we believe. For this reason it is a good idea to have an idea of what authentic Torah is. And also to read a few books about the widespread practice of con and scam--to show how easy it is to be fooled.