Depending on which items are flagged the account is put into a locked state, which means that access is limited. However, the droplets for that account and other services are not affected at all.
The account is also notified about the action and a dialogue is opened, to determine what the situation is.
There is no sudden loss of service. There is no loss of service without communication. If after multiple rounds of communication it is determined that the account is fraudulent, even then there is no loss of service that isn't communicated well in advance of the situation.