Well variables inside namespaces do not override others since variables are never affected by namespace but always global:
"Although any valid PHP code can be contained within a namespace, only four types of code are affected by namespaces: classes, interfaces, functions and constants. "
Source: "Defining Namespaces"
http://www.php.net/manual/en/language.namespaces.definition.php