OP has sold a LOT of pickup only items so I'm sure her phone number has been given out dozens of times.Perhaps the bidder also wanted to ask if the seller would accept cash on pickup which she doesn't have anywhere in her listings as a payment option,just bank deposit & Paypal & they couldn't be bothered messaging??  

rednikki871 is there some reason you dont offer cash on pick-up for your items (not COD)? Cash is always the best option for both buyer and seller when items are being collected in person.

The way to 'question' ebay policy is to use the suggestions link. You can find it on the site map.

I doubt very much if that is a policy ebay will be interested in changing.

Often a buyer or seller just wants the phone number so they can confirm the seller is who and where they say they are.

Especially where pick up items are concerned a prospective buyer may want to ask more in depth questions than can be fitted into the limited number of characters allowed in a contact email.