No cackling!

It’s already time to look ahead to spring trips. I found a lovely apartment in Rome, but I’m a bit confused by some of the house rules:

“Guests are asked not to cackle and have a decent attitude in public areas of the building; so as not to throw the cards out of the windows or anything else.”

So…. no card playing witches?  Can I give a hearty laugh while in the building as long as it’s not a cackle? What type of cards can I not throw out the window? Greeting cards? Playing cards? Is this really a problem in this neighborhood?