QUOTE(sourabhthaver @ May 26 2014, 07:28 AM)
i want to know that is this harmful to add different website links on same signature?
No its not.
But It make difference when you are posting in the particular category of website. So its best at that time your all signature must be of only 1 site.
For example if you are posting in health forum and your signature must be of health site only.