You haven’t addressed the argument that the other parents present a greater risk to children than staff. What do you think about that, and how could that be improved?
Responding to this point specifically:
I suppose it depends on the layout and rules of your softplay, but at our local one I don't believe it's the case that other parents present a greater risk. For the following reasons:
The staff wear a uniform. This gives children the idea that they are to be trusted and listened to more so than another parent. I've drummed into any children I'm caring for to never go anywhere with a stranger, but I think they potentially would go with a member of staff. In fact, when we're out and talking about what would happen if they got lost I actively encourage them to seek out a member of staff for help.
Parents are not allowed on the big playframe, it is instead supervised by members of staff. You cannot see all aspects of the playframe from outside so this means there are times and spaces that children and staff members are together out of sight of parents/carers. A parent in there would be asked to leave/easy to spot as they're an adult who isn't supposed to be there.
Our softplay offers music and arts n craft classes led by the softplay staff. They don't offer any classes run by other parents. Again, this gives staff an increased level of access to the children and an increased presumption of trust.
Some parents/carers, as is clear from this thread, assume that the staff are DBS checked so are likely to place trust in them that they wouldn't place in another parent.
I don't think, on balance, softplay staff need to be DBS checked, but I do think they pose a greater risk than another parent would based on my personal experiences of softplay centres.