I had a similar situation.
After I declined the request, he came back with another request. He did this six times so I now have six declines in a very short period of time. How will this effect my ratings?
The situation was this...he had a very bad review, saying he misled the host by saying he was visiting family. He then had a party with underage people and the cops had to be called. One side of my brain said No. The other side said lets see. I asked for the names and ages of the other three people. Sure enough they were 17, 18, and an adult. That's when I declined.
He kept coming back begging until I finally gave him the reason of the bad review and that my answer was final.
He requested two more times which I declined. By the way, he said he was visiting family as in the bad review.
Then in the same day, I got a request for the same time period saying visiting family from a name that was the same name as one of his guests. Six requests in all. Six declines. All in a day or two.
Im not sure if I should share the names here. If you want to know, I will.