My mother used to sing us to sleep with her parody of this lovely traditional song:

HUSH LITTLE BABY PARODY
(Roll&Go-c's mother)

Hush, little baby, don't you cry;
Mama's gonna pock you in the eye;
If that pock in the eye don't hurt,
Mama's gonna rub your face in the dirt;

If that dirt don't make you sore,
Mama's gonna wallop you some more;
If that walloping don't make you sick,
Mama's gonna whack you with a stick.

If that whacking don't break some bones,
Mama's gonna hit you with some stones;
If those stones don't hurt you none,
Mama's gonna shoot you with a gun.

If that gun don't kill you dead,
Mama's gonna bash you in the head;
If that bashin' seems like fun,
You're sure a tough little son-of-a-gun!

Probably no more harmful than Jean Ritchie's "What will I do with the Baby-o?."^^