[notnaut]

What?? What was the point, even?

[wongarsu]

Anyone can get in, but nobody can get in without leaving evidence behind.

[tiahura]

So you knew your kids had been doing something they shouldn't.

[ok123456]

It was meant to personalize settings on the family computer, not be Orange Book compliant.

[chgs]

To get people used to passwords

[notnaut]

This seems most likely, I guess? A username without a password would suit for leaving a trace?