All of my college activity has been while being an active JW......
I lived with a JW family while attending away from home when I was a teenager/young adult.
Over half of my KH is now attending college online too.....
I have never understood the WTS assertion between going to college and losing interest in 'kingdom interests'.
So I guess my answer is I know lots of JWs attending (some graduated), none have stopped being JWs as a result.