In Britain, the farming community and the gypsy community know each other. About 20 years ago, there was a high-profile shooting in Britain, this article from the Guardian gives an overview: https://www.theguardian.com/uk/2000/apr/19/audreygillan

It's a bit too bleeding-heart for my taste, even the Guardian admits to policing difficulties, there's little surprise that someone might take the law in their own hands if the government is absent. You'd guess similar dynamics are at play in South Africa.