Even so that's very strange way for a trespassing charge to be carried out if that's how it went down.

Typically when someone refuses to leave, police inform the person that they are being formally trespassed, at which point they have the option to leave voluntarily at which point they are only allowed back at the trespassee's discretion. Not sure how that would work for public places where people have to conduct municipal business.

According to police, that is what they did. Fellow was given the choice of leaving unrestrained or in handcuffs and he chose the latter option.