Hi benkyearn, welcome to the forum!
1 - Then you are protected from other sites “hotlinking” content from your site. That’s good.
Also make sure visitors can’t access site directories, only the directory’s index file and linked files. That can be user friendly done by having a default index file in each directory, e.g. an index.html, that could be empty or links or redirect to the start page, likely the index.php file in the site’s root directory.
2 - As @TechnoBear pointed out, anything the visitor can access can be copied.
There are many threads here about that subject, I’d like to referr to what a knowledgeable late member of this forum answered on this: Protecting website contents - "Anti copy" controls - #2 by felgall