Possibly people that have installed an illegal download of UT have any number of "extras" including malware.
I have always said that cheaters should be counted as a game mechanic (because they are unavoidable), and make tagged cheaters become the new objective, worth more points, or flags etc.
All non-tagged players are put into the same team, so can only kill the cheats.
Non-tagged players could all have the deemer radar now available at all times
The cheat gets auto-kicked upon death, and could even drop a special pickup, at which point all team allegiance is back to normal or none, and all hell breaks loose
I would call it "Bug Hunt" and have a banner displayed to all when it kicks in.
"Get yer biggest boots on people, we got some cockroaches to stomp on!!"
It also occurs to me that the community could have a shared dedicated server that is only running the Unreal jail cell or a modified Jailbreak map.
Tagged players could be sent to a new destination, instead of being "kicked".
Message displayed "Complain all you want, only the other condemned will hear you".
If it was a shared server, the data collection would be more handy to sift through.
However it would also be fun to have a clan themed jail or Hell to kick cheaters into.
...Oh the pain to be found in a Chaos prison would be joyous indeed
Joining again redirects them once more to jail, until the cheat is not detected.