这是个人一时的看法,如有不对之处,请谅解
若我有更为恰当的说法,或讲解,我会及时更改答案,请体谅
句意为
在没有意识到他们正在做着一些无聊事的情况下,他们无视社会常规
without后是个介词引领的句子做状语
being conscious that they are doing anything extraordinary:
可以说是系表结构
that they are doing anything extraordinary
是宾语