Thinking about my game world and what should happen in it in the not so close future, I came to a simple decision: WAR. This is an article on the topic of war.
Traps need to make sense. Somebody must of made it for a specific purpose.
When was the last time a character caught a cold or flu? Real people get them every now and again even with solid heating and dry interiors. Your characters are out in the cold and wet, and even inside is not always dry and warm. Imagine having to stop your dungeon crawl, sitting in a tight defensive position, while you all are feverish.