Unnatural link warning, how to respond to it?

[avinash]

You cannot just use disavow, its a request to google and it will take time so its better to contact the website owner to request for the removal of your unwanted links

If you think contacting site owners is good idea then you have no clue. They never response and not atleast to your terms or according to your terms.

Its better to disavow them. Yeah, it may take a month or two but it will be done. And moreover as Google will be doing it itself so any penalties that are responsible for those links will be removed automatically.