wouldnt your thief be a bit well.....un-thief-ish? i cant imagine a 6 foot half orc trying to pick somones pockets or open a lock with chunky fingers, unless he was a pigmy half orc that is
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but oh well i spose u can just bash down the doors and pop a hammer over somones head right? if stealth doesnt work go for the obvious!!!!
good luck and have fun.