I watch these intersections closely, yes. And make sure I have time to slam on the brakes if necessary. I've seen far too many cars blow through residential-area 25mph stop signs as if they don't exist, and it really only takes one to give you a very bad day. And that's in residential areas - in higher-speed quieter-area intersections like this,
hell yes I'm extra paranoid. I've seen multiple cars plow through intersections like this at triple the speed limit since I started driving.
As a biker, this all applies doubly so, because one mistake like this can pretty frequently be fatal. Be paranoid or you risk death, there's no alternative.