Uh this post is about someone messaging someone on FB Messenger. There is no need to do that as part of whatever surveillance thing you think you're doing.

I have a Facebook account that I use to scroll once or twice a week and see if anyone I know died. But I don't have a page for my business and I only use Messenger if I am trying to reach someone and have no other contact info. And even then I immediately get an email or cell number. I don't have random casual conversation there. It's all read and spied on.