Question for those in the know...

I checked my credit report a few months ago and found that after my father died, a bunch of his credit cards showed up on my credit report.  There are some on there that were opened before I was even born, but most are just accounts that have been active for decades, about 10 in all.  They have high limits, there is no balance on any of them, and they are all in good standing.  My question is this:  Do those accounts have much repurcussion on my credit?  Do them being there help or hurt my credit score?  Do I need to have them removed or just leave them alone?  If taking them off will lower my credit score, I don't want to mess with them.  

Serious replies, please.  I am genuinely at a loss on what to do.

I'd say close them to be safe.
They stay on your credit report after they are closed, but no one can steal your identity and use them.

Quoted: As I understand it, part of your score reflects the amount of debt you have compared to the amount of credit you have available. It's supposed to be better to have, for example, $2500 in CC debt with an available balance of $10000 than to have $2500 in CC debt with an available balance of $5000.

Yup--it can hurt you.  Creditors take a hard look at how much unsecured debt you have available to you when considering your creditworthiness.  Contact the companies involved and have them remove it from your file--only they can do it.  

Actually, I have no idea how his credit cards got onto my credit report.  I wasn't executor of the estate, my mother was.  She had bullets for credit, but after my father died, she can't get any credit at all.  The last time she filled out a cc app, she was denied.  The letter they sent her said she was denied credit due to her being deceased.  Uhhhh, okay.