You have apparently mis understood what i said by announcement thread. You dont make a announcement every time someone gets a name change -_- its a thread inside the announcement forum thats what i ment. and with there being not many members with over 1000 post then thats good just a reward for doing so well.
In addition to Sazzy's concerns, it would also be putting a lot of work on staff, as there are more than a few members who have over 1,000 posts. DB alone would be flooded with PMs about name changes. And to make an announcement every time someone changes their username...it would get out of control, and create more useless spam with responses like "I like your new name!"