It happened again

These people who ask how old my non-existent children are within the first lines of a message have to be bots or traffickers. Because why would you bring that immediately or even at all? I don't mention having children anyway, so why do people keep bringing it up? I just had to add "childfree" to my profile because this keeps happening & the usernames look familiar. I'm wondering why I'm receiving messages from blocked accounts. Does this happen to anyone else?