Underage Magic at the Weasley's (and in general)

[mavencree]

No: HPFGUIDX 53696

Self defense definitely would have to be an exception to the rule.  
Other than that, I think the law is in place to protect muggle-borns 
and/or underaged wizards living with muggles.  I mean, imagine if say 
Neville lived with muggles, and set an engorgement charm on someone's 
head or something.  And all he has is a toad, and no owl to call for 
help.  The person could die.  I don't think the Ministry is as 
concerned for families with adult wizards.  If they were they would 
probably age-mark the spells or put tracers on them for underaged 
people.  I think the Ministry is aware of where magical families are, 
and when magic shows up where they know no adult witch or wizard to 
be, that's when they investigate.

Maven