Guessologist

Probably not, thorium generally speaking isn't nearly as active as the radium that was going into everything else at the time. Kind of why its still tolerated in welding rods, and gas mantles until recently. Nowhere near safe still to rub it all through your gob.

For real? I use the IR blaster every day when the wife/kids have misplaced the TV remote or CBF getting up to grab it

It's all about how much silica is in the lava - not much and you have basalt, fairly runny so the gas escapes and you get fire fountaining and lava flows. More silica gives you very viscous lava like rhyolite or andesite - traps the gases, far more explosive and dangerous eruption styles.