The padlock banner is just a reminder. It's on all the newest versions of LW. Click on "More Info" at the end of the banner to learn more.
You don't have to know anyone. Once LW is connected to the internet, just search for the files you want and start d/loading. There are a lot of fake files on the network that cause problems for some people. For more info see:
Fake files showing up in search results How to find music(and movies).