hey bro.. this is illegal service!!!
stop please..
It is not an illegal service. There are many legitimate reasons you might want to remove a watermark and have full permission to do so. If the original copy is lost, this service could provide a lot of value. Many people watermark images they don't own which would equally be a crime in your weird way of thinking.
people only watermark pictures to make money from it, your doing the opposite and trying to make money so I don't know really but you can't get in trouble if you don't get reported right so carry on with this service