I have just found out that my parents don’t have a smoke alarm. It came up in a recent discussion. They didn’t seem to bothered about it, said it was a nuisance and that they turn all electrics off before going to bed. The reason for not having a smoke alarm is that apparently cooking sets the alarm off constantly. My DS2 sometimes stays overnight at their home. I have been really annoyed since I found out and am no longer happy to have DS spend the night. Would it be unreasonable to tell my parents that until they install a smoke alarm, my DS will no longer stay over?