There was "Spygate," then "Deflategate."
The Seahawks were well aware, and according to a Sports Illustrated report, beefed up security at their Super Bowl practices in Arizona as a precautionary measure.
Per Sports Illustrated: "Multiple teams called Seattle, unsolicited, with advice on how to secure the team's practices for the Super Bowl."
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Prior to Super Bowl XLIX, the Seahawks trained in Tempe, at Arizona State's practice outdoor practice fields.
According to the report, "they hired extra guards and scanned any area nearby with a vantage point of the field. Security personnel monitored what locals call "A" Mountain, the 1,400-foot hill that towers above the university's athletic complex."
In short, the Seahawks were prepared, in case something were to happen.
(h/t Sports Illustrated)