Struggling in the surf: Australian beaches pose dangers to newcomers
https://edition-m.cnn.com/2018/03/24/asia/australia-swimming-dangers-tibetans-intl/index.html
At least, to decrease death tolls caused by rips, it would be better to enclose safe area in each coast by ropes or something visible substance.
And, if someone passes over the border without permission, he/she should be punished.
Strict regulation like this would discourage people to dive into sea recklessly.
