I normally don't nitpick about spoiling, but something of a nature that tells someone of something that is very spoiling (and damages gameplay balance) when they haven't gotten to a point is pretty bad when it comes to spoiling.
Those who have played through the game before know of this, so it would only be good for those who haven't gotten that far, but it spoilss hard if they are told something that destroys game balance for awhile...well, you can see the problem with that, I'm sure.