Roku does have a warning on their website about this scam and it doesn't just happen with Roku, but any company that requires an activation as it's very easy for scammers to create copycat websites.

From the Netflix home screen, press the left arrow on the remote to bring up the side menu, then select Get Help > Sign out > Yes to sign out of Netflix on Roku. On the main Hulu page, select your ...

If you got a new Roku streaming device, we'll show you how to set it up and connect it to your TV.

Roku does have a warning on their website about this scam and it doesn't just happen with Roku, but any company that requires an activation as it's very easy for scammers to create copycat websites.