An advocate is seeking advice on filing a Public Interest Litigation (PIL) in India's Supreme Court against airlines that allegedly harass passengers by forcing them to buy return tickets, even when travelling on single-entry visas. The advocate believes this practice unfairly burdens budget travellers and cites an instance where a passenger was denied boarding. However, another user suggests that this issue might be better addressed through consumer forums rather than a PIL, as the Supreme Court typically handles PILs concerning fundamental rights, and a denied service complaint could be escalated through the consumer dispute resolution system.