Under age magic - just wondering?

[jelly92784]

No: HPFGUIDX 188298

AJM:
Why did the Dursleys seem totally ignorant of the fact that Harry was not allowed to perform magic outside school until he got his warning letter from the Ministry when Dobby performed magic in the Dursley's kitchen?

Janelle:
It is possible that the restriction on underage magic wasn't always in place.  Maybe it used to be allowed, but then too many accidents and problems resulted from underage wizards and the Ministry decided to enact the ban.