You don't have to memorize. Add them to the block list and open it while you're writing the report.
That would be great if the report window didn't make the rest of the interface disappear. Also makes it hard to quote the offending remarks when the chat box also disappears... I've e-mailed Muse about that and they said "good suggestion".
I do also think the report limit is too low, or possibly entirely unnecessary. I don't report people for being uncooperative - I report them for being racist, sexist, otherwise discriminatory, or actually trolling. It sucks to see someone engaging in that kind of behavior and not be able to do anything about it because I've reached the report limit. I also don't want to have to be like "hey guys can you report this guy cuz I've reached my limit" because part of the great thing about reports is that they're anonymous, and if they're not, you risk retaliation (counter-reports, or worse).