One of my most wanted features (second only to the Luck stat dictating the story.) is the ability to, y'know, never fire a shot or hit a bloke, and not because you're a sneaky stabby kind of person, but because you're smoother than the bottom of a baby rolled into one consistent ball.
Raiders want to mess you up for their entertainment? Suggest healthier, alternative lifestyles. Or give them another target. your choice.
Brotherhood of steal wanting your plasma rifle? Convince them that you can give them a better deal if they purchase the rifle rather than take it.
Canibals want to eat you? inform them you're infested with demonic worms and might become a ghoul at any second.
Killbot going to kill you? Remind him of his three kill limit.
Smoothskin supremecists convinced that they must destroy your unclean flesh? Spin sad tales of the cruel raider who burnt you and the deathclaw who made it worse.
An army of radscorpions beyond that door? Become the scorpion whisperer and get new pets.
Man with suicidal tendancies? Talk him out of a pointless death and into a pointfull one, as your new meatshield.
The chinese have you captive? Convince them that you yourself are chinese... In ENGLISH.
Americans have you captive? Convince them that you yourself are american... In AMERICAN.
The robots have you captive? Beep boop, boop boop beep boop beep!
Have no solid transportation to get you across the wastes? make honourable agreement over this matter to your native american spirit animal, the mutated mole rat, who shall be your epic mount.
Communists? Make them think that their system is flawed, and that they'd be better off as slaves and victims of commerce good americans.
Good science, good charisma? Tell someone you hate that there's good profit to be made from looting the batteries of pre-war cars (which may have been irradiated)
Good strength, good charisma? Inform puny enemy that you benchpress (slightly preposterous weight here. I have no clue what is a good number, i have never exercised or even moved)
Good perception, good charisma? Inform someone that you like their clothes; a horrible, horrible lie.