Hi Alorkin,
One thing you should know about ff dot net is that it strips email addresses and web site addresses from just about everywhere, including private messages. So if anyone has private messaging disabled on that site (hint) it makes it almost impossible to reply to a message received. :)
The answer is; I'm not aware of any situations such as those you asked about, and my thought would be to go for it.
If you want to email me about it, use bjdibbins at yahoo dot com dot au. :)
Cheers,
Brian