Hi Lawrie,
I think you've answered your own question
"Would you like me to organise a meeting for this type of scum to visit your property when your wife and kid’s are at home, without me being present or qualifying them first before they arrive?"
No Lawrie, I would not want you to bring such a person to my house. If I rely on an estate agent to conduct inspections there is every likelihood that they will bring such persons to my house and let them wander through as they please, without me knowing anything about it.
I would want to have some say as to who comes into my house, what parts of my house they have access to, and to see that they leave my things alone. I do not want to rely on you or anyone else for this.
I, my wife, and my kids regularly answer the door to strangers, and I can assure you Lawrie that we are all more discerning than you could ever be in terms of who we will or will not allow into our house. In this regard we, and not you, are the experts.
Finally, there is no estate agent out there who conducts escorted inspections in order to keep the client safe, or to safeguard the vendor's valuables. The purpose of the escorted inspection has everything to do with the agent remaining in control, and nothing to do with the interests of the vendor.
Regarding the contract - I'm glad you like it, and I hope other non-REIV members take advantage of it.