I can only tell you that my mom regularly had issues with people sending her .doc files, which she edited in OpenOffice and they came back somewhat garbled.
All the more reason to avoid the problem altogether and not create unreadable documents in Office.
Seriously: it's not like someone won't be able to buy a copy of LibreOffice. OTOH, a government should avoid mandating the use of proprietary solutions because they exclude people who can't pay for them.
