Do health advisories like this one keep you from enjoying the water?

We rode the motorcycle for a few hours on Saturday, and one of the places we stopped to stretch our legs was the pontoon bridge in Estherwood at the Mermentau River.  That's where we saw this shotgun blast-riddled sign:

Estherwood Bridge at the Mermentau River features a nifty sign of caution (Staff Photo)

Here is a closer look at the fine print:

Mermentau River Advisory (Staff Photo)

Do these warnings keep you from boating in the Mermentau (or any other) River?  Does it discourage you from eating any fish caught from these waters?