Pretty much anywhere on the map playing a full Anzio server. Every spot on the Anzio map has so many different places to flank someone from. This is why all the kpd-farmers who hide with mg everywhere do awful on anzio, because it is just does not work well on anzio. On donner, or strand, and most other maps I can think of, you can lie back in spawn or near spawn, there is no flanking, and so you can kpd-farm by playing really cowardly. None of these guys try doing it on Anzio because it just simply does not work.
Same goes with sniping on Anzio. The kpd-farm snipers (usually found on donner, strand, and avalanche) can find rather safe spots to sniper from. But sniping on Anzio is a big challenge because you get shot in the back all day long! It does not matter how well you know the map being back or side shot on Anzio is inevitable, it is just how the map is designed. You never find kpd-farmers playing anzio with sniper either.
The best way not do die on Anzio is to just move forward until you get to their spawn. If you stand around too much pretty soon someone will find your back.