The "Spotter activation" message is part of the NOAA format, weather there are spotters or not.
Florida does not have a tornado warning system in place, thus they have killer tornados. You can have one or the other, In theory you can have both, but as it turns out when you have the spotter/warning system in place. Deaths due to tornados go way down.
OF course, you can still have spotters. I mean, wherever I am there is a trained weather spotter (Even if I have no one to report to) but without a warning system... Why have spotters?
States that have spotters and warning systems have few deaths due to tornados.
States that do NOT, ... .Well, death toll is often quite high.
One reason for this is that some states train their police, (And some don't but still) and thus rely on the police to spot weather. (Even if not trained) well, Officer O'Mally sees a tornado, radios his dispatcher, who notifies his commander in the dispatch center, who drafts a message to headquarters, who tears it off the printer and carries it to their commander who drafts a message to the local county who then tear it off and take it to their commander who then dispatch a deputy to verify the state trooper's sighting and then the alarms go off... Of course a dozen people died in that half hour.
With weather spotters I, or someone like me spots a tornado, another confirms it, it's sent to NOAA within the minute, not within the hour but within the minute and less than a minute later the alarms are going off, 2-3 minuters v/s 20-30 minutes. Makes a whole lot of difference
But of course Florida does not have the alarms either... Unless you go out and buy your own.