The risk from keeping them together can't be that high if I've never had anything bad happen in years. In the end its all personal OPINION. I do it because I want too and because I can and none of my animals are suffering in anyway. If any of my animals started to show any negative signs from being with another snake then they would get separated.
- - - Updated - - -
I bet that was a nightmare! We'll I can't say much about that since all I know is what you said. Did you feed em in the same tank? How long were they together? Was the smell of food already in the air by the time you went to separate em?