Another way to avoid the ads yelling at you while you are trying to pump gas is to tap on the "Weather" or "Traffic" tabs on many gas pump interfaces.

I don't know how common it is elsewhere, but the stations I use that have at-the-pump advertising all have those features (and doing so on those pumps silences the audio at the pump).

[edited to mention the audio being silenced when the weather or traffic tab is selected]