Things are getting out of hand…
Nintendo Switch Sports has been out for less than a week and already people are noticing inappropriate user names popping up. Players on Reddit are voicing their concerns and suggesting Nintendo add a function to report users.
Nintendo already uses filters that ban certain words, though users are finding ways to circumvent this by adding numbers of other symbols.
Currently your only option available is to block a user you’ve recently played it, so be on the lookout.