Sobo, on a more serious note, you're right that property destruction is dangerous. But if you look at groups like the Weather Underground (who did injure people (including themselves) but then changed their stategies), you'll see that folks like this think very carefully about how to avoid injuring people and are pretty good at it. I'm not advocating for property destruction, because I think right now its a pretty shitty political strategy, but I'm not too concerned their political opponents are trumping up fears of personal injury.