That probably varies a lot by region and neighborhood. My neighbors and I don't usually stop at our stop sign. But the sight lines are good and none of us drive faster than 15 mph, so formally stopping just because there is a sign is not worth much. If someone is walking or riding their bike, we stop for them whether there's a stop sign or not. We did have a neighbor once who tended to speed, but peer pressure turns out to be pretty effective, he drives as slow as the rest of us now.
You should try to get the stop signs replaced by yields and possibly some traffic calming. A stop sign everyone blows through is a normalisation of deviance.
