class DRb::DRbObject

def respond_to?(msg_id, priv=false)

Routes respond_to? to the referenced remote object. 
def respond_to?(msg_id, priv=false)
  case msg_id
  when :_dump
    true
  when :marshal_dump
    false
  else
    method_missing(:respond_to?, msg_id, priv)
  end
end