If the UK government does proceed with a ban on children under 16 using online shopping sites like eBay - which might entail age verification for everyone in the UK for eBay - then those who feared that UK online safety policy was the start of a slippery slope would seem to be correct.
I can't imagine anyone proposing, with a straight face, that children should be banned from markets, car boot sales, or second hand shops.
@neil Have they banned them from email yet?