Every game that allows PvP has gankers, whether it's spawn camping in FPS (though this can stray into griefing), stealth insta killing in RPGs, or insta killing underpowered ships in Space games. It's just how some people play games.
One of the main reasons why I, in general, put any new games on my personal block list as in "am not now, will never be interested" whenever I see the letters "MP" anywhere in the announcement.
Not because I don't enjoy playing with other people but because humanity, being what it is, simply cannot take anything, no matter how wonderful it might be, and not instantly turn it into.
Present company excluded, of course.
Also, every game that has MP in it tends to turn into CoD instantly. Now, I don't dislike CoD at all, but I'd rather not have every single one of the games I play turn into it. If that's what I wanted, I could just play CoD all the time until I keeled over, frothing at the mouth, and had an aneurysm.