What HTTP does is ask the server for a web page. The server can then do whatever with the request, the most common reaction being to supply it. This means there's no copyright considerations, trademarks, or other terms of use. In real life, if you're a copyright holder I can ask you for a copy of the material, and you can give it to me or not, as you please (in my experience, offering money makes people more willing to give me copyrighted stuff).
If a retail store is open, I have implicit permission to walk in and look at things all I like. If a server is accepting HTTP requests, I can presumably look at things there. If the server has some restrictions on HTTP requests it responds to, that's cool, but most don't.