Is it always mandatory to do a web check-in, which usually opens 24–48 hours before departure and helps lock your seat? On overbooked or full flights, passengers who have not done web check-in may be the first to lose seats. Recently, a passenger took to social media to share that he was denied boarding as the flight was “overbooked” and he had not done a web check-in. “Reached the airport at 5 AM for my 6:40 AM Pune-Bengaluru flight. The ticket was booked 9 days in advance, and I even paid extra to select my seat. And still… I was denied boarding. Reason? ‘Flight is overbooked,'” he shared in a post on Instagram. He added, “They told me that since I didn’t do web check-in, my seat was given to someone else. Why should I web check in if I know I have checked in luggage and need to go to the counter anyway! Plus, when I am already on time?…