Actually, Germany is going through this right now. There have been several leading politicians that have been driven from office due to copy/paste without footnotes. Before getting indignant, it may be interesting to note that some of the politicians graduated Summa cum laude. This means that the evaluation of their work by the universities was everything except cum laude. How can it be possible to grant the highest honor without noticing that something is wrong?
What is interesting for me is HOW they found the plagiarism. It turns out that there are common phrases to combine thoughts that do not belong to the writer. Computer programs analysed the doctoral thesis and spit out a lot of stuff for closer scrutiny. For those that understand german, this site is an eye opener: VroniPlag Wiki
These techniques are also useful here at TM. Most of the time it is VERY easy to read where the poster stole their information and if any personal experience is involved at all. It is most interesting when you challenge the post.