Philip
Explorer
Scion said:silence stops wand use.
That's not the point. You have readied your Silence spell against enemy spellcasting, not against the use of a wand.
SRD said:Distracting Spellcasters: You can ready an attack against a spellcaster with the trigger “if she starts casting a spell.” If you damage the spellcaster, she may lose the spell she was trying to cast (as determined by her Concentration check result).
If you allow someone to ready a silence against any action that might be hampered by the use of silence, I think you are iintepreting the ready action too broadly.