There is a difference between taking photographs as a spotter, and some of the photographs that appear showing people (not specifically bus staff) acting unreasonably.
As the disputed areas are on private property, they are within their rights to prohibit photography, but more difficult to enforce when using a phone.
They do not have the right to demand that images are deleted (not even the police can do that) - it would require a court order - but they can prevent access to the area if they so decide (though difficult if it is a bus station).
