The shepherd thought that other wild animals or mischief-makers would be scared of the "dog"'s presence and not harm his flock while it was around.

牧羊人心想，其他野兽或者坏蛋看到这“牧羊犬”准会被吓跑，有它在，谁也不敢害他的羊。 。

youdao

The cave, certainly, is an occasion for easy irony: the man who has perhaps done more than any other person to entice generations of children to spend their playtime indoors, in front of a video screen, happened to develop his peculiar talent while playing outdoors, at whatever amusements or mischief he could muster.

NEWYORKER: Master of Play

According to the hacker group, known as Goatse Security, a flaw in the Safari browser would allow cybercriminals to hijack iPads and use them for sending spam, stealing passwords or other mischief.

FORBES: AT&T Hackers: iPad Security Flaw Still Unpatched

Besides stealing electronic cash, a thief could exploit stored data for mischief - or blackmail.

CNN: ASIANOW - Asiaweek