I thought about it, and I think I wouldn't be so turned off of 7days if they had just said "we took inspiration from other games!" instead of saying "ORIGINAL SYSTEM! OUR IDEA! DO NOT COPY! DEFINITELY NOT A COPY OF OTHER VERY POPULAR GAMES WAY OF DOING THINGS! WE BAN YOU IF YOU SAY IT IS! OUR FANS WILL CASTRATE YOU IF YOU EVEN THINK ITS LIKE THAT OTHER THING, EVEN FOR A SPLIT SECOND!"
So basically it's like Minecraft with DayZ's graphics and The War Z's forum management.