The ‘printer of fire’ error used to be a legitimate and important concern. Ye olde printers really could light their paper on fire under certain circumstances and they would typically be huge devices in dedicated rooms rather than something right next to your system. Letting people know to check on it when specific things went wrong probably saved a few buildings from burning down with people in them.
The bad cheese is orange, the good cheese is yellow or white. More seriously, the orange cheese melts at lower temperatures and doesn’t separate after melting. It can be good for grilled sandwiches and I’m told you can add small amounts to cheese sauces to prevent them from separating when stored in the fridge without impacting the flavor.