1. All sects have healthy cash flow to allow their disciples to spend their days perfecting their martial arts skills. This can only mean they rely on donation or extortion to flourish.
2. All swordspeople are skilled grooming experts. No matter where they might be - either in cross-country pursuit, or marooned on an island, they would always appear well-coiffed with make-up and carry a secret stash of spare clothes to change.
3. Men have long tresses like women. If a man is above 30, he is required to have a moustache and if he is pushing 50, include a beard as well. If he is an octogenarian, when he is sprouting words of wisdom, he will need to stroke his beard as well.
4. For a woman, going under disguise simply means putting on a fake moustache and she will be instantly unrecognisable. For a man, smearing some dirt on your face would do the same trick.