Some do this because they think that the job market is skewed against them, and might also have the sentiments that these 'seats' within the companies are reserved for 'rich people' or the 'upper castes', when that's hardly the case. Bear in mind some companies/universities/schools only hire from a certain caste, that is a thing. One's caste is clearly mentioned in the Ration Cards, not sure if it's the case on the Aadhar Card.
Fining them for an opportunity they thought they were going to get by 'gaming the system they were gamed out of' is just kicking them repeatedly, and does no one any good.