Yes.. I noticed that. (but therein also lies the point...) Casting the spell on the coin doesn't HAVE to be a cascading effect that immediately triggers battle and chaos.
Per ACTUAL gameplay. Ramad has the coin and not Raze and he is currently 30 feet from visibility and hasn't taken a move action.
1) Someone can notice the problem and suggest an alternate course
2) The spell can be ended
3) The coin can be moved
4) Other actions can be taken (spells cast, attacks made, etc...) before Ramad moves into combat.
5) Surprise rounds exist
** The problem is a bit blown out of proportion now. So, it's fine, lets just run it forward. **