6,000 to 12,000 years old is what I heard. I'm guessing that this "Christians Against Science" page is a joke community that is making fun of YECs by saying it's 4,000.
If you look at pictures of people doing a "human flag pole" you'll see that they all have their arms spread wide, with one hand above them and the other one below. And if you look at the guy in the background, you can see he is looking at the guys feet instead of at the man himself. So, yes, this old guy is absolutely being lifted up by his feet.
Surviving sharpened examples point to actual use as weapons, but their rarity, and the training necessary to use them, strongly suggest that they were only rarely used as such.
I think you are on the right train of thought for this. A real person injecting themselves probably should be considered a NSFW image but a cartoon/meme character shouldn't be.
Ideally we would have NSFW, NSFL, and something like NSFG (Not Safe For Grandma) tags.
I believe you are looking for hydrostatic equilibrium. There don't seem to be good answers for this online, but according to Robert Black on this Quora post:
There isn't a minimium per se but the generally accepted number for a mass to form into a sphere under its own gravity is 1/10,000th the mass of the Earth or 600 quintillion kg. As for size, it really depends on the composition of the body. The numbers are generally accepted to have a diameter of about 600km for a rocky body.
A quintillion is 1 x 10 to the 18th and Phobos has a mass of 1.0659 x 10 to the 16th kilograms and a diameter of 22 kilometers.
Same, I block communities but have yet to block a person.