It ruined my grades while I was a freshman and a sophomore so definitely not.
I used to play on pvp servers in multiplayer all the time a couple years ago and despite it making me salty as hell, I played it anyways.
I'm now close to graduating but I don't play Minecraft as much and don't play multiplayer anymore.
Instead, I will just occasionally create a singleplayer world and play with some mods then quit playing a few weeks later.
I just don't get that same childlike wonder that I felt when I started playing it back in 2011.
