Alec was warned by Tilapia not to venture near the river again, but Alec wasn't intimidated by the threat. Worst case scenario, they would take away his catch, but he had the right to defend himself, sort of.
Because he wasn't a true citizen of the Zulu clan he resided, he wasn't protected by the law. His human rights were practically stripped off of him, making him more or less equal to an animal.
But, again, Alec didn't care. His exit from the game was just one confirmation away. He packed up his fishing tools and went further down the river shore. When he turned back, he saw that he was at a reasonable distance away from the fishermen, he unpacked and resumed his fishing routine.
Five hours later, he was done, so he packed up and headed home, but he didn't head to the usual path he took. To avoid unnecessary trouble from Tilapia, he took another path, even though it was a long cut.