I didn't actually have a solid opinion yet, I just was pointing out my dislike of certain aspects of the Stealth mechanics. After reading Cafall's post though, I think I may be slightly leaning towards agreeing that it would be possible to set a trap while stealthed. I think the only thing is, I would still want to see players only doing it if they have logical cover. I don't think I would be comfortable with someone sneaking up infront of their enemy to set a trap. But then, this also stems from my dislike of the stealth mechanics itself.