Sick colleagues

There have been cases when a new joinee is asked for some money because some body in the team referred him/her. I name these people as sick colleagues.

Some dialogues from sick colleagues:

1. I took your interview , i passed you so you got the job. give me half month salary of yours.
2. I referred you give me some money.
3. I short listed you , give me money.
4. I will see that you get placed for this vacancy, just give me one month salary of yours.

What should a best engineer do in such case?
  In my opinion he/she should say fuck yourself and report it to HR and other team members so everybody will know the sick colleague's nature.