In my opinion borders are a bad thing because they can be very dangerous places with the high fences if people try climb the wall and fail they could seriously injure themselves or even in some severe cases kill themselves .Also if you were to try and cross some Borders without a passport or a visa you can be Rejected and told to go back home or even go to Prison in some cases.yet loads of people still come To these borders in the hope that they can escape their home to a new country.Also some countries can be very controlling with border such as north korea.In north korea, you are not allowed to enter or leave north korea without special permissions. However,they can also be good as they can be easily controlled by border Police and the military. They can also separate things really easily . eg.stop illegal immigrants crossing the Mexican border over to America and keep peace between countries.