Internet???

I feel the internet is very close to blurring the lines of legally owned.  If you stop to think about sites like youtube, wikipedia, answers.com, and many more you would realize that they print information on stuff that is important but you have no way of making sure they haven't stole it from someone else.  On youtube anyone can put up there videos and from there its fair game.  How is it that we should not expect someone to copy and paste the link to use for themselves.  So as you can see you actually lose all expectation of not being plagiarized because it is out there for anybody to see and use.  From that point the proof is on the information provider to prove it was stolen from them.  This is why you stick with proven to be legitament websites or you could be accused of plagiarism when you didn't even mean to do it.