Hello jainlalit,
We have recently announced some changes to the feedback system later this year. I am happy to say that this includes your suggestion - we will be removing all feedback from users who are suspended within 90 days of registering.
I request all of you to please read details of these changes at out Announcement Board. http://www2.ebay.com/aw/in/200506.shtml#2005-06-24192504
Secondly, eBay already provides an option for you to reply to the feedback you have received. This way, if someone has given you an unjustified rating, you can reply with your comments so the rest of the community can understand the full picture.
Thanks and regards,
Regards,
Rohit
Community Development Team
Thanks and Regards,
Rohit,
Buyer Engagement Team