All true, and sometimes the filters don't work, for instance last week one of the notams in our briefing pack was reminding us of the new regulations for north sea helicopter operations. We fly fixed wing.
The flight plan comes from the company and as a crew you read the notams to be aware of whats on route and any potentially dangerous issues, but I think the point is, would you then object as a crew and refile the plan with a 500 mile detour when the notam is for FL320 and below, and everyone else is routing that way?