It should be - if a server firehose streams all players' network data to an analysis thing, it should be able to detect patterns of impossible accuracy and response time, even though there is some margin for error due to e.g. lag and packet loss (iirc intentional lag / packet loss are some strategies cheaters use to obfuscate things like aimbots, e.g. generating movements that shoot someone in the head but holding them back for a second or so so that in theory a competent player could have done the required motions within a second instead of 1/100th thereof)