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Also what these articles always fail to consider: Usually protests become violent when peaceful protests have failed. So violent protests often face something that is much harder to change/politicians are more unwilling to change. So of course they are less often successful. Not because they are less effective, but because the nature of their demands is different.
I don't know about ancient duel rules to say whether bringing a sling was permitted. The take is more along the lines of "David wasn't an underdog. If anything, David was the clear favourite to win because of his weapon". Because a sling at the time was a highly effective and deadly weapon which was still regularly used for centuries after the supposed events of that biblical story because of its effectiveness.
Couldn't it just be that in those states, straight people watch a lot less porn so the gay people living there just make up a bigger percentage of porn being watched?