Have only one place to manage the Customers in Jira Service Desk.

Currently, there are 2 places to manage customers Customer and Peoples tab in a project. If a customer is added/invited to a project it is added to Customer tab and added to People tab as well and becomes hard to manage.
Customer/people management in JSD is extremely confusing.
It's a bad idea to have two similar but distinctly different places to manage access.

Workaround
If you manage customers using JSM Organisations instead of individual customers, then the customers will not show up in the People tab. Customers shown in People tab can later be removed after adding an Organisation with the customers included in it.