Update of localUser after each authentication, but what for?

[radke]

on 145 line of /Authentication/Adapter/HybridAuth.php there is:

$this->update($localUser, $provider, $userProfile);

I wonder what is it for?
My already registered users each time they login via providers
get updates of their name (which they can change in registration process).

I can imagine some cases its ok, but I think is better when we would have some switcher in configuration for this.

Thanks.
R.