When people share/use your personal wifi could they steal your passwords and info along with it?

Hello, I have a comcast wifi but I was never able to set a password in it so I am afraid that people who steal my wifi to use could acess my personal

Hello, I have a comcast wifi but I was never able to set a password in it so I am afraid that people who steal my wifi to use could acess my personal info? Thanks

or:Hello, I have a comcast wifi but I was never able to set a password in it so I am afraid that people who steal my wifi to use could acess my personal info? Thanks

or:Yes they truly can. That happened to my family four times until Comcast let us close our own wifi name and password.\ue058\ue058\ue058

Tags:personal,