My girls have never had a sleepover and only ever had a babysitter put them to bed on two occasions.

If my parents lived closer (they're in the UK), I can imagine my almost five-year-old having sleepovers there but NO WAY for my two-year-old (must change my sig). That's not because I don't trust my parents, I just wouldn't feel right about it.

I think I started feeling a lot less protective when I was confident that DD1 could verbally express her needs. Obviously a two-year-old is nowhere near at that stage.

Maybe it will be the same for you too.

(PS - I would be cautious about commenting on Facebook about this stuff. Can become very heated very quickly and there's nothing to be gained).