nohello.net seems aggressive to just respond with. I would just ignore the hi, until it becomes an issue, which causes a problem. At that point, I would follow

nohello.net seems aggressive to just respond with. I would just ignore the hi, until it becomes an issue, which causes a problem. At that point, I would follow up with them saying, “hey, in the future, could you include your request with the initial <<hi>> message so I can get to it faster?”