When the visitor profile is disabled, we're already disabling the visitorId segment.

However, the userId segment is still enabled thus still allowing to identify individual users.

We would need to implement a similar logic as https://github.com/matomo-org/matomo/blob/5.0.0-b4/plugins/CoreHome/Columns/VisitorId.php#L45-L59 to disable the UserID segment when the visitor profile is disabled.