When your CEO gets up and says "We don't hire anybody over 28 years old," a dozen lawsuits should be filed within a week. It's amazing people let other people get away with ruling the world this way.
*edit: I had over/under switched in the CEO quote. Fixed.
> The Age Discrimination in Employment Act (ADEA) only forbids age discrimination against people who are age 40 or older. It does not protect workers under the age of 40, although some states do have laws that protect younger workers from age discrimination.
Note: It's completely acceptable to discriminate against your boss though. If your boss is going through his fourth divorce and has 8 kids, maybe you don't want to work there.
You don't know if the interviewee is married to a Muslim, an invalid, etc -- if they are, you're open to a lawsuit claiming that was the basis of your discrimination. Just don't ask!
For the second link, it seems like most include protection for marriage status, but almost none for familial status. I'm not sure how that translates in this scenario.