Make your wifi password unique

Most wireless routers comes with default password. This default password is easy to guess by hackers, especially if they know the router manufacturer. When selecting a good password for your wireless network, make sure it is at least 20 characters long and includes numbers, letters, and various symbols. This setting will make it difficult for hackers to access your network. Unless the people on the internet company are hacker themselves. Also, be careful with your router’s location at home. Anyone who has access with the numbers and passwords aside from people you know can easily get that to stalk or worse to get information.

This make sense. I think it is also better to cover the numbers by using a tape some of a kind right?

It is better to write the information and save. You are right, try to cover the whole numbers or better color it with a pen.