We once had a gas range break at one of the range top control knobs, thus lighting up and shooting fire straight out the front of the stove. However, we also have had electric range elements blow. The top element wasn't too bad, it just blew a hole in our best pan. The oven element, however, sent so much molten element and sparks all over that some made it outside the oven and onto the floor. The range top was unexpected. I should have known the oven element was going to go, as it had a slightly brighter spot the day before when we used it.
So, either gas or electric, the best safety method is prevention through maintenance. We much prefer cooking with gas. Having just moved, we have a new natural gas stove to install. I haven't found the right size gas line locally yet, and am trying to be as safe as possible when I go to hook it up.
As for the dummie, I can't imagine tearing out the stove pipe when it was just an obstruction. We had it happen once with a wood burning stove. Clear the obstruction and burn the stove properly. If need be, call a chimney sweep to clean the flue. Unless the pipe was actually damaged, they just spent money and beat themselves up.