Yes and yes. However we would obviously need to know what the issue is.
In general bans are only issued for repeat offenders, with the exception of spammers.
Simon
Am 06.10.2015 um 19:19 schrieb Garp CH:
Dear all
There is any way to ban that user and revert 34450469 changeset?
https://www.openstreetmap.org/user/natino/history
Thanks a lot G4rp
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