being a good online citizen involves not getting scammed.
to be a good online citizen you have to remember that people want to steal your identity. to protect yourself from them you need to have a strong password. you also need to be aware where you buy things online.
being a good online citizen involves having rights & responsibilities
digital citizens have the right to privacy, free speech ,etc. basic digital rights must be addressed and understood. people may ask you for Private information. you shouldn't give them any of your private information. you shouldn't post inappropriate things online.
being a good online citizen involves not plagiarizing others work
you need to be aware that most things on the internet is copyrighted. you can't just copy and paste words from other places and call it your own. if you do violate copyright you could get sued.