OOP: Different Evil Weasley?

[greatlit2003]

No: HPFGUIDX 67857

Could Bill be the evil Weasley? Maybe Percy is not the deviant after 
all. Bill was in the hospital wing with Harry & company after 
Voldie's return in GoF. There was no reason for him to be there in 
terms of the plot, except he left at the end to contact his father 
(but Mrs. Weasley could have done that when she got home). What if 
it wasn't his father that he contacted? 

In OOP, why did he leave Egypt to come work in Britain 
if "Dumbledore wants as many foreign wizards brought in as 
possible" ? (p. 70 US edition) Charlie remains in Romania to recruit 
foreigners to the Order. 

Also, in OOP, when the kids are talking about Snape in Grimmauld 
Place, Ginny says, "Bill doesn't like him either." (p. 69 US 
edition) Again, this little line about Bill seems out of place. The 
younger Weasley kids don't talk about their older siblings too much. 
We don't know Bill and Charlie's opinions on different subjects. It 
just seems odd that JKR placed those lines into Ginny's mouth. It is 
possible that Bill is a DE who dislikes Snape because he showed off 
his Dark Mark to Fudge in the hospital wing. Bill might have ran 
straight to Voldemort and told him what Snape had done.

Bill is around the age of the DEs. I am guessing that he is in his 
late 20s, and many of the DEs (Snape, Lestrange, Avery, etc) are in 
their mid 30s.

Bill has to have a knowledge of Dark Magic if his career involves 
breaking curses. He probably studied N.E.W.T. level DADA (or more)

greatlit2003