I just googled decorations being banned from offices and the Dailymail ran a story in 2006 saying 75% offices are banning decorations because they're afraid of offending people based on a survey done in the US.
If you find the same story being reported by someone who isn't trying to wind up the sort of people who love this sort of stuff it looks like the year before 71% of offices in the US didn't allow personal christmas decorations because it looks unprofessional.
A case of the whole country reading a headline and getting annoyed about nothing yet again.