how to block other users from downloading of content from the internet

I use the Macbook Pro. Please help me with the queries:

How can I block users from downloading content from the internet?
How can I set password after which the password would be needed in order to download content from the internet?

Is there a way I can block my webcam from being used by assigning a password to use the webcam?
2 answers Last reply Best Answer
More about block users downloading content internet
  1. Best answer
    Lock up the ethernet cables and turn off/MAC filter WiFi in your router.

    Electrical tape.

    If you don't pay for the connection, don't boot other people off it.
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