Well, The Beatles themselves included some "clues" about Paul´s "death" just to sharpen and blow the fans´minds you know, but some people gone crazy and deeply to those stuffs, and they´ve been searchin´n´researchin´such things all these years and sometimes digging things only them notice. I don´t particulary have patience to search such those things. I think it sucks a lot!!! Maybe once or twice just for curiosity I had reading any of those things but couldn´t stand so much ´cos was boring me. I read in a interview that Paul even in present days have to answer questions about that weirdness sometimes when he only grins and say:"What can I do? I can´t get in those peoples´mind, and c´mon, let´em breakdown their minds if they wanna carry on this, cos´I don´t care!!"