The short answer is yes. It is possible to exit and reenter the airport. Whether or not you should depends on a range of factors, including if you're traveling internationally or domestically and how much time you have between flights.
What are the consequences of skiplagging?
If an airline catches you skiplagging, in most scenarios it will punish you as per the terms and conditions of the ticket you're flying on. The punishments could range from financial penalties to restrictions on future booked travel. In some instances, skiplagging passengers have been taken to court by the airline.
Will skiplagging get you banned?
She continued: “While a one-off occurrence could go unnoticed, any travelers that are repeat offenders run the risk of being flagged in the airline's system and potentially banned from flying with the airline in the future.”