@pickyaxe: Yeah, provided you don't play with
do_db_update, and to a general extent on current FW versions (post-WAL), I'm now fairly confident your DB integrity will be preserved
(he said, hoping not to jinx it ^^) 
.
Even on my end, with my devices being subjected to some fairly untoward things, the worst that ever happened was WiFi passwords getting thrown into the nether (which may or may not even be related to what I was doing at the time ;p).