Ah come on we've all taken ideas and specs from drawings from previous jobs etc. But I agree with your last point regarding just blind copying without understanding the specifications and why they are there in the first place.I agree with Woody.
I'm all for DIY and trying to produce your own drawings but why not just ask specific questions here with the points you are stuck on and people like me and Woody and plenty of others will freely give advice. To just copy parts of someone else's drawings and building regulations notes is out of order and I'm surprised at some of the regulars who have suggested it.
It has taken me many years of study, training and experience to be able to produce my drawings and the thought of people just stealing them annoys me. Whenever you look at applications through Council's websites there are clear warnings about copyright theft but I suppose that depends on your moral compass. Besides if you just copy notes and details without understanding them they may not be appropriate for your project and you end up designing in a potentially expensive problem.