We haven't had this discussion in our MG either, but I suspect that we're a pretty relaxed group about toys in general. I guess I just don't want to be the one who has a kid that wrecks another kids toys, or does a big spew on them that can't be washed out...so for me it depends on what the toys are made of & how easy to wash they are. I'm really happy to share plastic washable toys, but soft fabric toys I'd rather were used for one child only - so if the soft toy belongs to another kid I'll make sure that Liam doesn't get it in his mouth, and if it's Liam's soft toys I tend not to have them available for other kids to grab IYKWIM.