I’d rather see people take advantage of the system without justification than have the GAs challenge people who have a disability or illness that is not visible. In regard to pax who board with a wheelchair but disembark without one, it is more confusing, tiring, and stressful to get through check-in, TSA, finding a gate, and standing in a long line to board than it is to walk off the plane and wait for an electric cart or walk straight to baggage claim.