Obvious but nevertheless interesting ...

Traders' email messages give frauds away, study shows 

 http://www.independent.co.uk/news/uk/crime/traders-email-messages-give-frauds-away-study-shows-8441797.html 

...  Software developed by accountancy firm Ernst & Young together with the FBI has identified 3,000 examples of the potentially incriminating phrases which if identified early enough could save companies millions of pounds in lost profits.
Those who fear being caught may also give themselves away by using phrases such as “do not volunteer information”. Traders under pressure can signal danger by telling colleagues they “want no part of this” or are “not comfortable”. The system can also be applied to SMS and instant messaging. ...