I think this depends on your children's age. If your kids are reasonable 15+, then sure. You shouldn't be spying on them. If your kids are 12? Then you probably should be.
This is less about spying or snooping and more about knowing children aren't mature enough to have private conversations with strangers.
This is less about spying or snooping and more about knowing children aren't mature enough to have private conversations with strangers.