I believe US law is the same as UK law in that ignorance of the law cannot be used as a defence. In other words, it's not incumbent for anyone to give you this information (and you to receive it), it is incumbent on you to find it out! Having said this, most university media based courses do include lectures/information on copyright and in some countries inclusion of copyright and other legal issues (such as Health and Safety) are a legal requirement for government accredited qualifications. The basics of copyright law are not taught in general compulsory education though, which is one of the reasons why, in this day and age of it being so easy to create, copy and distribute content. that so many people don't understand it, don't agree with it and/or routinely break it.