If your console gets banned because using CFW, it's most likely that you cant use it for most nintendo services.
For Europe they tend to superban and that includes CDN as well but the active account not.
You can't deactivate your account or remove it, the support does decline to remove active accounts from banned consoles.
Rule 1#: Remove your account if it contains money or buyed games before tainting it with CFW.
Rule 2#: Never use your CFW console online.
Rule 3#: If you want to use CFW and online services, buy another switch and seperate your needs.
Rule 4#: Don't complain if you get banned.