I suppose if a hacker really exists then IHG will be starting a lawsuit. Afterall I'm sure they are insured against hackers. Of course it would look bad for them to start a lawsuit and have Police come in and find out that it was in fact a fat finger of a disgruntled employee.
I sense that this could get very interesting.
I think we're getting fixated on the word "hacker." I think that the paper used that word for sensationalist purposes.
I bet the manager said someone went in and changed it (meaning revenue management in Atlanta or something). The paper interpreted it as a break-in, which it wasn't.
Remember papers are often inaccurate.