I cant say if its safe or not... But let it air out or something for sure... I used superglue to attach the bowl to the stem of my homemade perc bong that I smoked out of quite a bit for a little while, and im still alive.
NO! It will poison you! The label says TOXIC for a reason... I am amazed every day on the GC forums...some people prove that Darwin was onto something...
if heat is near the superglue you are not going to want to be inhaling that, but if the glue is nowhere near any heat then you will be fine just make sure to let it dry fully and air out a good bit
Probably not the best idea, but I've had to do this for a week or two, and I'm still alive. But like I said... probably not the best idea.