I suggest you call and speak directly with PayPal. I have found them to be cordial and helpful. Ask their help and advice as to how to protect yourself as a seller of higher value items.
I am puzzled by the privacy law comment. I would think that both parties in a transaction are entitled to all information concerning the transaction.
On chargebacks, the seller is entitled to dispute the chargeback and show evidence of them fulfilling the sale such as proof of shipping and proof of delivery, which in PayPal's case they want to be viewable online. eMails from the buyer may be added proof that they received the goods and can be forwarded.
Some sellers don't try to follow the PayPal guidelines on sales which they require to be able to assure seller payment. Those include online viewable delivery confirmation on every sale and sales only within the U.S.
My solid suggestions to you would be that every package be insured and have online delivery confirmation up to $200 and above $200, require online signature confirmation.
If you sell outside the U.S., know that your sales will be higher and so will your fraudulent transactions. Study the PayPal site and others looking for their list of approved countries where they allow transactions. Refuse transactions from countries that are excluded by PayPal. Check with other payment services as to the countries they feel are where high fraud rates are originating. Refuse those countries too. You can balance risk with more sales by controlling which countries you as a seller permit. This is all done in your terms.
Dennis