Is selecting Random reportable?

It's not reportable, as long as you don't invade other people's lanes.

Ex: You randomed Ekko and someone else already picked mid, but you still go mid. That's reportable.

You randomed Ekko and someone else already picked all the roles, except for ADC. You go Assassin bot. That's fine.

as long as it's normals, that is

how does your team know you pressed random?

No but... Don't do it...

Oh lets just use everything that's there. Hey look, a gun, let me use that just because. Oh no, now I'm in prison. #regret