Rusty is spot on. If people choose not to respond on the first message why are they there at all? Slack, no-interest, good-for-nothing, waste of SFEC spacers. Public would love to know that Bill didn't feel like driving today, so his family died in a house fire. That's OK though, Bill. No worries.. We'll page for someone else to come. Maybe after 15 mins we'll ask for another brigade, then wait while they page for more crew.
If members don't get the first page then FIX THE PAGING SYSTEM.