As slides go, this one is fairly benign. Just filter for that character names.
Filter for "Harry|Percy|Hermione|Sirius|Riddle" in Comment. Add keywords as the shill adapts.
It's actually good practice to learn how to write filters.
Yes. I made a comment about that in direct response to one of his posts. I said he seemed to be in a "celebratory mood" as if things were going extremely well..