indeed, the only useful spots now are the ones where you are in front of a fence so they can't throw a knife at you.
And these spots are just camp spots. As soon as most survivors are dead, they will find and kill you as soon as you fire a single shot, because they are not easily defendable spots at that.
The OP should rename this thread to "infected camp spots", cause noone uses these spots to kill infected. They only use it to make sure they're the last survivor and can leech points that way.