No one has caught fire. In areas where there are no hot Democratic Primary contests, it wouldn't surprise me if some Democratic voters would seek to sabatoge the Republicans by taking a Republican ballot and voting for convicted felon (and surprise 2002 nominee) Al Hanson. It will be interesting to compare Republican Primary turnout (relative to 2002) in the city's 4th senate district and the 57th, 58th, 59th and 60th house districts (where there are hot Democratic primaries) with the rest of the City (where there are none), and whether the Hanson vote spikes in the same areas that turnout spikes.

"some Democratic voters"

I've always thought that the existence of that malicious cross-voting primary partisan was an urban myth.

Since we don't have permanent party registrations in Missouri I have no doubt that some people who usually vote for one party's candidates sometimes vote in a different primary because of the appeal of a candidate (e.g., Jack Danforth Dems), but I wonder how many actual partisan sabotagers (e.g., vote for the felon) there really are outside of political mythology.