The 'secret room' is just NOT that! Nearly everyone knows about it! So if you do get in the room, dont think you can stay there 24/7!
I mean, even if there is no-one in there, you will see players lobbing a grenade or firing a rocket throw the window just in case! SO basically, just avoid the room! You wont get killed as often if ya do!
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Close isn't good enough unless you throw a grenade!