Remove options from guest logins

I'm currently testing SD+ with the aim of implementing it soon. However i want all staff in our organization to login in under 1 guest account and then select their ID from a mandatory additional field.
This is so staff can see all requests and see just how busy our support department gets.

However, if everyone logs in under 1 account, is there a way to remove options from the account so different staff members don't keep changing various options.

We would like to remove the 'My Details' tab, the 'Personalize' option by the logout button, and would like to stop staff changing the layout of the columns in the requests page.

Any help would be appreciated.