This is an interesting read detailing the continued growth of fuel pump skimming, in this case with specific examples from the state of Arizona.  One particularly interesting tidbit is the discussion of pump master keys.  As someone who has worked around and supported from the periphery many fuel centers, I have witnessed first hand the challenges of dealing with pump locks.  Most pumps are indeed keyed alike and there is a significant expense to the retailer to convert to non-standard locks.  This is an issue that should be better addressed at the industry level.

https://krebsonsecurity.com/2016/09/inside-arizonas-pump-skimmer-scourge/