If U want to keep ur nimbuzz main id or flood ids safe, all you need to do is to register a mobile no. or an email in that id. Whenever anyone hacks ur id, u can goto forgot password in nimbuzz client and give ur phone number over there, u will get the password of ur hacked id as an sms on ur phone, and if u have registered an email id in ur nimbuz id, then visit [You must be registered and logged in to see this link.]
and write the email address u have registered, fill the capcha and submit, u will get a password reset link as an email, click on that link and u will be taken to a page where u can reset ur password and hence get ur id back.
But now the problem is that if a hacker hacks ur id, he/she most of the time removes the phone number and email from account details of ur id which make it useless for one to use password reset methods, but u should not panic, as nimbuzz server stores the history of ur account, in that case all u have to do is to send an email at [You must be registered and logged in to see this link.]
from ur registered email and inform the support about ur id being hacked, and also give all the details like
1. Email and ph nos registered.
2. Date and time when id was hacked.
3. Date when id was created.
4. Previous password.
5. If anyone had warned you.
and u can add some more details like no. of contacts, time of last successful login etc. HOPE THIS HELPS