Pretty much everyone is going to carry on plugging in US-sourced media just as they did before, and be happy and unconcerned about it.
To borrow from James Mickens [1] the vast majority of people's thread modelling falls into the 'NOT-MOSSAD' category. People with a 'MOSSAD' threat model should not have been inserting arbitrary removable media into their secure computers in the first place, so their habits don't need to change. Although obviously some people either incorrectly assessed their threats, and need to upgrade them, or were careless and need to be more careful...
To borrow from James Mickens [1] the vast majority of people's thread modelling falls into the 'NOT-MOSSAD' category. People with a 'MOSSAD' threat model should not have been inserting arbitrary removable media into their secure computers in the first place, so their habits don't need to change. Although obviously some people either incorrectly assessed their threats, and need to upgrade them, or were careless and need to be more careful...
[1] http://research.microsoft.com/en-us/people/mickens/thisworld...