CORRECTION! you can remain in the pattern for touch and goes OR
Remaining in the pattern can also mean leaving the pattern in a direction opposite to how your taking off.
Lets say I am leaving KLAX for example, I am in a Cessna and am flying VFR. I take off at runway 25L “remaining in the pattern” this lets the TOWER aware of what I am doing. When following the pattern normally you enter in on a downwind at 45 degrees and leave the downwind at 45 degrees. so lets say instead of heading out over the coast I want to make left traffic head towards the east. This also depends on the airspace you have recently been cleared for early talking to ATC.
Reminder there are air traffic controllers and TOWER controllers and Ground controllers.
back on topic: so I am on the downwind for 25L and now I am ready to make my departure to the east. I leave the pattern according to the pattern instructions ( 45 degree exit of downwind) and now I am out of he pattern and also away from the departing and the arriving traffic from the runway.
OR you can just remain in the pattern and contact the tower and report I am left base for 25L. You will most likely get clearance to land ( TOWER WILL NOT TELL YOU WHEN TO TURN FINAL!!!)
Keep in mind while flying in the pattern you MUST maintain the pattern altitude (Generally about 2500’MSL above the airport for major airports)
Granted this is a video game but its always nice to get some actual knowledge.
NOW to the question NO There shall not be a barrier locking the people who are doing pattern work. Towers should just keep and eye on them when they are flying. PILOTS follow the pattern diagram and follow Towers instructions!