parsha bit: Naso

Parshat Naso describes the vow of the Nazarite. Our sages are divided on the value of this kind of vow. Rabbi Yitzchak, in the Jerusalem talmud, teaches that if you are present when someone is considering taking such a vow, you must shock him to his senses by asking: "Are not all the restrictions of torah enough for you? Why do you insist on restraining yourself from what the torah permits you to enjoy?" (Nedarim 9:1, Yerushalmi)

Relevant to chumrot (extra stringencies not commanded by halacha), perhaps?