be careful what you wish for

「望みが叶ったが故に、望ましくない何かも起こってしまうことがあるので、気をつけよう」。割と根が暗い格言ですが

The Appeal (and Ethics) of Hackintoshing: Should Apple License the Mac OS? on TheAppleBlog

So this is definitely one of those matters where the “be careful what you wish for” axiom applies.