[Yes; L should have, when Mello first arrived. It was a mistake to engage him on any level. It was a mistake to engage any of them on any level, from the very beginning, and that dismal legacy has quite a literal body count.

He should let Mello walk, but Aizawa's words ring in his memory. I also hate how you've always gotta have the last word!]

Or?

[He turns as Mello passes, folding his arms over his chest.]

Should I fear any number of acts you can't believe you'd ever carry out? Because that's precisely the problem: I do.