disable disabling wireless from my notebook (laptop)

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http://forums.opensuse.org – Hi, I've bought an Acer Aspire 5810T(imeline),I notice after installation of opensuse 11.2 that network-manager has been installed by default probably because my laptop computer is containing a wireless device. I only want my computer using ethernet (with the cable) and so want to know which methods exist to shut down as securely as possible wireless to avoid any missuse activity Is there any possibility to shutdown traffic by locking with a password? Thank's for your suggestions! PS: I do not have any wifi relay or antenna at home but want to avoid any relay in my neighbourhood from getting into my computer... (Distributions)