Why don't they brake or take the wands?

[agnesbrauner]

No: HPFGUIDX 74350

You know when Harry, Neville and Hermione is fighting against the two 
Death Eaters inside the Time-room, one is stunned, and Herry is 
fighting the other one, and Neville shouts "expelliarmus!" and Harry 
and the Death Eater loses their wands, and then the Death Eater gets 
stunned by Hermione and gets a baby's head etc etc... Before Harry 
leaves the room, why not take the two death eaters wands (the baby 
head's and the one that is stunned on the floor) and brake them? Or 
maybe keep them? If the two Death Eaters get back to normal, they 
will be powerless without their wands. Harry just have to say "accio 
wands!" and he will get them and be able to break them apart. I think 
this is very obvious and it is very strange that they don't do that...

/Thoughts from the newbie Agnes from Sweden (pardon my terrible 
English)