Sometimes this is logical, other times it seems like an attention grab. It is fairly common for certain communities on, for example, Livejournal to be overly sensitive to people's 'triggers' (often but not always relating to sexual assault)--any mention of violence may be censored.
Why having kids later is a really big deal. The average age of American women having their first child reached a record high of 26 years old in 2013, according to the Centers for Disease Control and Prevention's National Vital Statistics Report.
Since 1985, the rate of women having their first child between age 40-44 has risen steadily, though it's still far below that for women ages 35-39: CDC. Rates for all births, not just of a first child, to women over 35 have been rising over the past 20 years, while birth rates for younger women are stable or declining.