This is a complete non story.
No pilot is just going to release the parking brake without speaking to the goundcrew and making sure the tug is connected first and the area around the aircraft is clear. As someone said, all you have to do is cycle the brakes off and on which involves applying manual brake pressure to over-ride the parking brake, then re-applying it which as no safety risk.
No-one cares about arrival on time performance, in fact if anything I've seen people cycle the brakes AFTER arriving on stand but before the doors are opened in order to get more flying time logged towards the annual total, especially if there is a long delay before ground staff attend the aircraft.