I agree - I have also reported several and also received several of those mails.
So yes - it works - but perhaps sometimes it takes some time.
Also think perhaps - way too many report just because they feel the guy knows too much. This game is about beeing spotted - you get spotted constantly and that is not cheat.
Some perhaps have invested a lot of money into a super headset that can resolve all the tiny micro details - that is also not cheat.
Tactics - be quiet - stop and listen for other players and not just run around constantly - could help.
Play with sensitivity on mouse - could also help with aim.
Again - report - all we can do !