I am still seeing the spam reviews - user account skyinsummer51989 - I now have three of them in the last month - the oldest is 19 days old
As for the troll review/comments I do understand what you are saying. I feel it's interesting that the individual stopped commenting once I stopped responding, but of course I am leaving the comments there. It's up to individual readers to decide the merits.
I am just concerned that leaving a five star review up with random scramble looks like I'm pandering for ratings rather than curating to provide prospective readers with useful critiques or recommendations