[@Bartimaeus]

Not really to be honest. The posts could be accumulated in non-rp/long interest check threads which gives them a very high ratio, even if they aren't reliable - or a person could have a low ratio but only be involved in PM rps/one board rp and be incredibly reliable. It's one reason why 'check Recent Posts' has come up as a suggestion since it gives an accurate picture of when their lasts posts were and where.

For the record, not dissing on people who post in the non-rp boards. Just that if a person has a high ratio but all of their posts come from Spam, you can't really guess if they have a tendency to flake or not, which is what's at the heart of this discussion.