It seems that the idea that reasonability is all relative has already been brought up, but I thought I would give my two cents as well. I agree that the suggestion that is made is only reasonable, relative to the situation in which it is made. A character probably wouldn't turn on himself, and...
I'm not sure if I should be promoting websites here or not, but I must say that there is a vast library of short and long adventures that you can get for a small price that can be converted to fit exactly how many party members and their levels and a number of other aspects at www.direkobold.com...
I was a newbie, first time out, playing with a group of very experienced guys. No idea what I was doing and they gave me a cleric to play. The next thing I know we are coming across a roper that attacks and kills me while the rest of the party goes off looking for other creatures and...
Have you ever come across a Dire Kobold? What do you think of them? They can be very nasty and could be something you might be interested in if you like kobolds and destroying PC's so much. :D