Mostly plot holes and other logical inconsistencies within the story:
-Megaton's history. Talk to Nathan's wife (forget her name) and listen to Megaton's backstory. She'll basically tell you that a group of people walked miles towards an airport, COMPLETELY disassembled it, then built a home around an atomic bomb. So much derp I don't even....
-The fact that supposedly Megaton has existed for years, but no one's ever considered looting the Super market just down the street.
-Little Lamplight. 'nuff said.
-How Tenpenny Tower's societal structure makes zero damned sense for the setting. Wealth implies work and progress. For a person to become wealthy, they typically must work, and of course the community will show the fruits of their labor. Despite there being an entire tower filled with wealthy people who've basically "retired," the Capitol Wasteland is an outrageous sh**hole.
"But they could've helped some other community and then come to Tenpenny Tower to retire!"
Ok, who in their right mind would choose one of the most desolate, heavily irradiated parts of the post-apocalyptic wasteland as their retirement home of choice? I mean really now....
Likewise, why do these people agree to pay Tenpenny? They pay their savings towards a guy who presumably uses the money to pay for guards and...his own ammunition for "safari." So basically, everyone within the tower can only stay as long as they can afford to live there, they have to buy food etc with their own money, but also have to pay to stay and their entry fee/rent ends up paying for ammo that gets wasted. Why in the HELL aren't the people of this community communist? Why in the HELL aren't they killing off Tenpenny (who's nothing but a waste of damned resources at this point), pooling together their money and then using their said money to simply make sure they can buy enough food and water from passing caravans so that all of them can live out comfortable, safe lives? They could let the not-so-rich guards have a cut and be a part of the community if they simply agreed to provide security for it. I mean [censored], you think the guards are gonna be like "you stopped paying me, I'm leaving" if he didn't pay them? The tower is the safest, most comfortable place to be in the wasteland, I'm sure they'd do just about anything to stay instead of going somewhere else. Or hell, why the HELL aren't the guards saying "hey, tower filled with a bunch of helpless rich snobs and every resource imaginable," banding together and shooting up the place to take it all for themselves?
As it stands now though, they're all paying for guards, the right to live there, and then money comes out of their own pockets to pay for food and Tenpenny's stupid safaris. Everyone's just kind of sitting in place in this ridiculous societal structure without considering how easy it would be to get more, or how Tenpenny's literally endangering all of them for such stupid, frivilous reasons.
-How no one has considered "hey maybe we should get off our asses" for over 200 years. Seriously. To quote someone else on these forums (forget who), "the Enclave are the first group of people to try and get something done in the Capitol Wasteland, and look what happened to them." Good job D.C., you killed off the active people. Way to go. Truly the good guys have won.
-Nobody has a food supply. The caravan traders are literally the heroes of the wasteland. Without them, one can only assume every single community in D.C. would sit on their asses until they starved to death.