They certainly do miss some dangerous items, including weapons; but they also do catch thousands of people per year trying to take firearms on planes.
How many of these people intended political violence against civilians (i.e. terrorism) is not determined. Some may intend ordinary nonpolitical violent crime. Some may be really stupid hunters who don't read the signs that are all over airports telling hunters not to try to carry on firearms. Some may be really incompetent gun smugglers. Some may have just forgotten which backpack they put their handgun in.
There are 10,000-year-old arrowheads sold for that much or less. They're not scarce or sacred or anything; they're literally weapons that were made in mass quantities for warfare or hunting.
Ideologically, Leninism supported vanguardism, a variation on Marxism that said that the Communist party was supposed to drag the early-20th-century proletariat into the revolution, instead of waiting for late capitalism where the proletariat would (according to Marx) naturally become revolutionary. This, and the notion of "false consciousness", authorized Communist parties to go against the expressed (democratic) will of the proletariat, on the theory that the proletariat's judgment was clouded by false consciousness, while still claiming to act in the interests of the proletariat.
Basically, "we (the party) know better than you (the people)" was ingrained into Leninism from the beginning, and the major communist revolutions either were or became Leninist. Maoism was a branch off of Leninism as well.
Yep. I was thinking of Heinlein's 1952 The Rolling Stones, where the person doing the timing calls out commands to the person controlling the engines, like an old-timey sea captain. (And in German, despite being an English-speaking family, because rocketry is German, donchaknow: Brennschluss!)
In some mid-20th-century science-fiction novels, people in the 21st century are piloting rockets by manual control, using slide rules to calculate trajectories.
One thing you get with open-source games is families of variants, where the code for a game has been forked and developed in different directions by different developers.
OG roguelikes such as Nethack and Angband are an example of this. Rather than mods for a single game, there are variants — code forks that add new features, quests, monsters, skill systems, user interface elements, and so on. There are several dozen Angband variants. Some variants draw upon multiple other ones, combining patches to make a particular developer's preferred form of the game.
A very different example would be the character Alfred Bester from Babylon 5. B5's Bester is the main "Psi Cop" in the show — a strong telepath who enforces the strict laws on other telepaths. He is named for the science-fiction author Alfred Bester, whose novel The Demolished Man established several of the telepathy tropes that are used in B5, including the existence of a formal organization that manages telepaths and telepath/mundane relations: in the novel it's called the Esper Guild, in B5, it's the Psi Corps.
Language arises out of social behavior, beginning with imitation and reinforcement in early childhood. Children who don't learn language (by interacting with adults and older children) in the critical period of early childhood, suffer serious developmental problems. So language is fundamentally anti-solipsistic, even anti-individualistic: you only acquire it by being brought into a community of language-users.
And written language begins as an encoding for spoken (or signed) language: everyone learns to speak (or sign) before they learn to read, and learning to read starts with learning associations between written structures and spoken ones. (For English-speakers, that means phonics: the relationship between letters or groups of letters, and sounds.)
Meaning isn't "assigned" solipsistically; rather it's "acquired" from a community of use. A single user can't decide for themselves that "dog" means squirrel. I suspect that if you look at the word "dog" and try to convince yourself that it refers to a bushy-tailed tree-climbing nut-munching rodent, you will be aware that you are doing something very silly, something deliberately contrary to your knowledge.
Then of course, the choice is yours...