Raspberry Pi have never done any testing for ex-zones, so we cannot comment on it at all. In fact, I would recommend not using them in such an enviroment without doing you own very thorough testing.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
"My grief counseller just died, luckily, he was so good, I didn't care."