Basic methods of corporate blackmail?

The basic methods of Corporate Blackmail are as follows :

i) Corporate Blackmailers generally threaten that they will leak the vital information like credit card details of the authorised person in public .

ii) Greenmail - Buying a good amount of shares and threatening the company to buy back the sharesat a higher price or they will takeover the company.

iii) Blackmailers generally threaten by saying that they will file law suit against the company for plagiarism