Undercover Percy: who notified Dumbledore?

[yukonpup]

No: HPFGUIDX 81048

 "hickengruendler said

> None of the other ears of Dumbledore at the Ministry isn't that 
close 
> to Fudge, as Percy is. That means none of them knows as much about 
> Fudge's plans as Percy. Even the portraits can't hear everything. 
> Having a spy that close to Fudge would be very important from 
> Dumbledore, and because is that close to Fudge, Percy is more 
likely 
> to get fired than any other member of the mistry, if Fudge doesn't 
> trust him completely. That's the main reason, why I, too, think, 
that 
> undercover Percy is at least possible. But I have big problems 
with 
> his behaviour at Christmas. That's why I think Git!Percy or 
Imperio'd!
> Percy is more likely. Someone kidnapped and replaced was already 
> done, as a much more important part of the plot than putting the 
> Imperio curse on Krum. I don't think JKR will use another 
Polyjuiced 
> Storyline.
> 
now me, Laurie

What if Percy agreed to be Imperio'd by DD?  Would he then be the 
perfect spy?  And would Percy and DD agree to this without Mr and 
Mrs Weasley and the fam knowing?