As always, pretty stupid way of getting banned - as rich said, you would think they'd be extra careful to make sure they complied with whereabouts reporting. And I have no idea why just one year, but 2 year is the maximum period so therefore one year could be seen as being a "warning" was showing others that the French will impose bans?
And it looks as if it is a year ban, not one of those "bans" which started sometime a long time ago and finishes the day after it is imposed.
But it's still pants.