This sort of thing (internet threats and the like) happens a lot to game devs. A looooooot. For a recent example see Phil Fish, who is himself a special case because he dished the threats right back out before ragequitting everything. It shouldn't happen, of course, but I guess that's what happens when a big bulk of your fanbase is a bunch of 15 year old boys. Force them to play nothing but old classics until they grow up IMO.