So by your logic, I should be able to leave negative feedback for every tire kicker that has no intention of buying, but wastes my time anyway, then disappears.
Seller Silence
On two occasions during the past month I have posted a question to a seller about whether the item still has a manufacturers warranty. One selling an Aurender N20 and the other a JVC NZ700 projector. Neither has responded even though it has been a few weeks.
There should be a way to leave seller feedback before a sale to inform potential buyers of this issue.