Earlier quoted context omitted.
Vegetarian is a huge identity marker. Quote from a professor from my college to my then girlfriend about me - “I wish he was at least a vegetarian”. I happen to be a vegan now and I have a lighter complexion and I clearly get assumed to be “upper caste” and somehow “smart” goes along with it. Answering to GP above - I don’t mind talking about it but some bar conversations have opened with it. That’s not pleasant. It’…
I'm a total outsider and don't know a thing about the caste system, so forgive me being ignorant: how do others know to which caste someone belongs? Would it be possible to claim another caste and just roll with it? What if one changed their surname to something usually associated with a certain caste?
It is entirely possible, however it does require you to learn nuances of that caste. Otherwise you will get caught out especially while discussing with elders. That said when it comes to marriage there’s no way to hide your caste. The priest knows your parents their relatives and what not. Their surnames being different will cause all kinds of red lights to go off.
Also, for governmental purposes you are expected to produce “caste certificate” which you can’t forge. So it’s not unusual for people in India to marry into lower caste to reap the benefits of governmental reservation.
So, the answer is nuanced. If you want to take advantage of surname in a private company like say Cisco then go for it. For any other purpose, changing surname alone isn’t sufficient. In fact it’s impossible to hide your caste.
While we are at it, it’s worth noting that “caste” refers to two distinct and intertwined hierarchical structures called “varna” and “jati”. Which means even among Brahmins (the upper most caste, intact Brahmin is a Varna and not Jati) there’s a hierarchy, priest being the top most. Jatis are sometimes referred as “sub-caste”.
This Jati is so pervasive in India that even the non-Hindu religions such as Sikhism and “Lingayat” which were explicitly formed to be away from the Hindu caste system couldn’t escape it. So we now have a few dozen Jati within Sikhism and Lingayats with an overly of Verna.
As an academic topic it’s a fascinating one. The roots of this codified structure is still not clear, it’s an active area of research. Recent advancements in human evolutionary genetics is revealing some interesting insights but long way to go.