This situation came up last night:
A hero was sitting on a glyph when he received a Stun token. In his next turn, he discarded the Stun token as per the rules and went happily to Tamalir for a normal Restock action.
This rendered the Stun token completely useless.
Any thoughts on this? I know that heros can Restock in Tamalir Burning or being Webbed or whatnot, but these tokens at least don´t simply go away and have the potential to interfere with the hero´s plans.