Indian visa applications require information on one's ancestry, details of one's parents, their places of birth, nationality etc. I doubt they verify these as I've never had any visa rejections despite putting down approximate but fictitious information in some cases for family members. It's possible anyone disclosing Porki ancestry would be subject to extra checks but chances are fraudulent applications will succeed provided the lies are convincing enough and don't arouse too much suspicion. There are more chances of crypto Porkis being stopped at immigration as first time visitors based on interview, behavioural cues or travel history, especially if it includes Porkistan. This nevertheless is a glaring security loophole but I can't think of any easy way of plugging it without resorting to explicit religious profiling of applications.