I hate travel days, packing up your bag, dealing with whatever means of transport is necessary to get to your next destination, and especially crossing borders. Borders are some of the most stressful places on earth, they're generally crowded, everybody is nervous, excited, tired, and just wants to get through and move on. It's not much better for the people working at them either, they have to deal with these people who are tired and stressed out, which in turn wears them down. Borders are also a place of great opportunity for locals; tourists are generally out of place, uncomfortable, unable to properly communicate, and easy to take advantage of. This translates to dollar signs for the clever, tricky, and/or dishonest locals looking to make a buck off the passing tourist, and even more stress and uncertainty for that tourist.