What are disadvantages of schengen?

The Schengen Area can pose several disadvantages, such as reduced border control, which may lead to security concerns and increased illegal Immigration. Additionally, countries within the Schengen Zone may face challenges in managing different immigration policies and pressures from external migration flows. The elimination of border checks can also strain local infrastructure in popular tourist destinations, leading to overcrowding and resource allocation issues. Lastly, countries experiencing economic hardship may find it difficult to cope without the ability to control their own borders effectively.