Hey Goose
Frags, stun, flashes and smokes are not allowed to be thrown into spawns unless someone is firing at you from said spawn. If you blindly throw any nade into an area where a spawn will be affected by the nade then its not allowed. If the effect of the nade does not hinder the spawn in any way by means of damaging or blinding the spawning players etc then it is allowed. So just to clarify, you can throw blind nades as long as your blind nade does not land into a spawn point or affect the spawn in any way then it is allowed.