Hopefully they know to delete the test server characters quite regular too, or indeed just shut them down once testing has finished on the updates they are working on. The complaining will be epic from stupid people that don't have anything on main servers that used gamesharked chars to get loot on the test server. "I wanted to take my loot back to my main account, I worked for it!"

Regular char deletions or whatever will ensure people get the idea into their heads that it's a test service and nothing else, I can already see people wanting to play constatnly on the test server if they left it up full time.