Opinion on demo accts?

I had this idea to give each new employee a demo acct as part of the on-boarding process. They can configure it to their liking and not interfere with other user's testing states. Would there be any misgivings to this idea? The only thing I can think of is that it may be miscontrued with a real account. Then I figure each new employee can be given a unique code identifier like lm101507 to denote a company test acct? Let me know your opinions?