vk the rules are clear but that does not prevent debate and suggestions being made.
The lounges are already heaving at peak times and I for one would welcome the scrapping of automatic guest access in favour of say 10 guest passes a year. Possibly fewer for silver.
In this day and age the technology to manage this electronically via the card or BA. Com is surely available. Indeed pre booking via BA.com and manage my booking could help manage staffing and food preparation.
Such a system would allow families to get access as suggested by others, would reduce overcrowding, whilst providing me with choice in how I wish to use this particular element of the membership benefit. After all we are sold the benefit of choice is Almost all aspects of premium travel so why not this one.