Why isn't Google visiting NIT Trichy for campus placements? Have they blacklisted NIT Trichy?

Every college has some internal issues with the corporate sector. NIT Trichy happens to have some issues with Google. 

NIT Trichy’s training and placement department is rumored to have restricted Google from visiting the campus. An action was taken by the institute to prevent other companies from blacklisting the college. If the companies would have blacklisted the college, the placement sector here would have gone downhill.