Possibly, it is indeed a lot of work entering the data manually but maybe we can use a google forms to create something like that and might be some few volunteers for digging up some on the known alts of any-one and some other threads that's related to bounty cheating (I would be willing to) but needed to have some ideas about the formats that will be used in the spreadsheet.
Feel free to use the format and the data that is already in my own BLACKLIST: HERE.
I've made this list a few months ago and tried to list known alts/bounty cheaters that are reported on Timelord2067's Known Alts of any-one - A User Generated List Mk III (2022 Q1). Mostly the recent ones. Got no time to dig the old reports.
While the entire list is far from perfect, it does help me from time to time on screening out these cheaters 'cause these guys don't know when to quit. Despite getting tagged, they'll just pop up and participate again, most likely they do not bother looking at their own trust rating.