Combat logging IS against FDev policy and they've stated as much. Menu-logging via the 15-second logout timer, is not (though still viewed as CLogging by many).
If you play in open, you are accepting the risk of getting murdered... some people simply like to play that aspect of it, and it's fine. I've faced a only few rebuys that way, and most of my play is in open.
Mainly, NEVER fly a ship without defenses in open! You do NOT skimp on shields, boosters, defenses in open for a few extra ly's jump, or for a few tons of cargo. A properly fitted trade ship, with the right engineer mods, can survive most attacks long enough to get into the slot... or to high wake away if interdicted.