[ Not only does Light grow impatient, he doesn't bother to hide it. By the time L's finished, Light looks both unhappy and unimpressed. If not for the worry of having the cake splattered onto him, he'd spoken up sooner.

This is entirely intentional.

'Interfering with Kira' probably isn't an acceptable answer.

He sighs. ]

Crimes against children.

[ It's a trite, likely predictable answer but aside from the one thing Light has put above all else, it's also true. As someone who sincerely does yearn for his idea of justice, the innocent deserve the most protection, aside from himself, and children are the most innocent. ]

It's not my chosen field, but it's going to be a common answer. But, there are a lot of things that can be bad without the worst.

[ Light's eyes flicker to the spot where John had been standing. ]

But his crime is larger than that, isn't it? He's not grabbing kids off the street.

[ His monsterious deed was big and grand enough to gain L's attention.

And L also checked out Mercy. It's a fact that floats back into his mind on occasion. ]