Re: Ethical
Well, the strength of the bias is certainly undisclosed, but the bias itself isn't. Lois is a known associate of (and beneficiary of) the superhuman community. The ridiculous number of times Superman has saved her life is obviously on record, since she always makes an article out of it, and writing about the beginning of her friendship with Diana earned her a Pulitzer. She's been on the cape beat for a long time, it's inevitable that she should have good relationships with and therefore a favorable view toward many of them, which I'm sure she herself would readily admit.
The bigger concern to my mind would be Clark's secret ID; if she writes around it, that's one thing - part of a reporter's job is to determine what the public has a right to know and what the public doesn't - but sooner or later it seems inevitable that she interview him and ask a question to which he has to lie to protect his civilian ID. And if she knows it's a lie - which she would - and prints it, that is as unkosher as it gets.
Of course she's not nearly in as gross a position as Clark himself.