Beach Safety advice on tripadvisor Australia

Found on tripadvisor Australia:

"The first rule of beach safety is: ALWAYS SWIM BETWEEN THE FLAGS."

http://www.tripadvisor.com.au/Travel-g255055-c54170/Australia:Beach.Safety.html

Such as stopping for a red light is a human's automatism, so this rule should also be an automatism when going to the beach for a swim.