You're overreacting. Corporate should have a minimal defense against these kinds of attacks in the court. One defense is "Okay, we don't speak this in our company. We made it clear by policy and if someone does at least this is evidence that it's not our company-wide strategy". Of course, whether this claim is accepted or not is up to the court, but interpreting this as a part of evidence destruction is pretty "creative" and I see this as a signal of being a weak case.