Remove files shared with me

Hello everyone.  Something similar has happened to me.  On my company computers there is a name listed under "People" and this individual has shared a file with me (by mistake I assume).  Through a lot of digging I finally found out he is an attorney and it was paperwork from some case he had worked on. I don't know him and whatever the docs are, have nothing to do with me.  The secretary I talked to didn't seem to care and said, "I don't believe it's confidential. Just ignore it."  I don't want to ignore it!  Every time I log on there it is.  It's intrusive!  And before you all say just hide it, no, there should be a way to not automatically accept unwanted shares.  What if it was something like illegal pics are something that could get a person in trouble.  This to me is a big security concern.