Display Name restrictions

Why can't I use brackets, like [,],(,) in user display name?
This seems like over-validation.
[98 byte] By [MichaelEntinSQLIS] at [2007-12-16]
# 1
This is because of a legacy issue with display names on the forums.
JoeMorel-MSFT at 2007-9-9 > top of Msdn Tech,Feedback for forums and MSDN websites,Suggestions for Forums website...