I disagree, the reason for taking sanctuary in an embassy is to avoid arrest. Arresting people as they leave a church has a chilling effect on freedom of religion. There are other ways and means of arresting people that would be less harmful than waiting outside a place of worship. If a person is using a Church as a method of evading arrest, I would be okay with arresting them if they leave. If they are casually going to church and leaving when the service is over, I think there is generally a better way.