Q: Deleted shared reminder list

Hey folks.

I had a private reminder list on my mac. And for some reason i thougt i could share it with my calendar when i highlighted the broadcast icon. I typed the letter "C" in shared section and then the sidebar autohide. When i looked at my list i had shared this private list with every email with a "C" in it.

So now I have sent a mail to everyone with a C in it to take part in my list.

This is persons at work, persons i dont realy know and so on.

I panicked and deleted the list right away. Can the persons invited still se the list? or will it just say "this list dont excist anymore" if they open the email?

I use the icloud reminders so it sync with iphone and ipad.

Is there any way turning this completly off so this cant happen again?

Sorry for my english.

And thx for all feedback in advance, (This realy scared me )