I used to pull up to a light and put bike in neutral, fold arms and relax. After reading a bunch of these types of posts, I have stopped this unsafe practice and try to allow an escape route as well as watch my mirrors for rear approaching traffic. I stay in gear at least until I have a car or two safely stopped behind me.

it's not just the cars coming from behind that you have to worry about. A few years back I was sitting at an intersection. A bobtail truck with no trailer was coming down the Hiway, the light turned red for him and he locked up the brakes and started losing control. He started coming straight for me. Luckily, I always have the bike in gear and was able to escape. If I was in neutral, I don't know if I'd have had enough time.