Document groups as the callside way to specify where things go

[oxinabox]

Via early filtered logger

[oxinabox]

Should definately do this.
Good example:
Some log messages might require responding to by someone who is on-call immedately.
Rather than waiting for someone to check the logs.

So can use:
@warn "External action required to prevent meltdown." group=:notify_oncall

Or using groups to mark a particular type of problem that needs a particular kind of fix.

Memento uses seperate loggers for this.

I think I had most of this discussion with @iamed2 a while back