Inventions

Would someone in the electronic gaming community please invent a signal beacon that can be placed outside the room so anyone approaching the game player's computer can tell if the player is in an uninterruptable, life-threatening place in the game? 

It's no fun to be greeted with "OK, now I'm dead. What did you want?"

And, for those of you in the auto industry, how about running the A/C system under the cupholders so you'd have the option to keep hot drinks hot in winter and iced drinks cold in summer?

Thanks!