First of all, we kindly ask you to post in English since this is an English forum and moderators and most of user will not understand you and be able to help otherwise.
As to your question, network scan is not forbidden in a public network (otherwise you would not be able to run it at all) but it's not recommended. Since the feature checks for weak passwords and scans remote devices, it might be incorrectly evaluated as an attack by the others.
Boris0FF gave kudos to Marcos in Сканирование сети (Network scan)
