
Well.......
At some point
someone will have to gently and kindly point out the ins & outs of this to the enquirer. If you don't have the patience and tact to do it yourself (not all of us do!) then I'd suggest pass the enquiry onto someone who does. If nobody does, then you have a potential new BYB on the scene.
If you delete it and don't reply then that could add to the 'snooty breeder' image.
If you do reply and frame it nicely but still in the negative, you risk their response because it's not what they wanted to hear.
It's a difficult call, but for my own peace of mind (when I have had similar strange requests, not dog related), I've gone for the friendly support & education angle. I can then sleep well, knowing that I've given them the whole picture and whatever they choose to do next, they have had the offer of backup from me if needed. If they choose to tread another path, then that's their choice, and I'm gone.
There are those who listen, and those who don't.... and closed minds don't care what you have to say anyway.... but once in a while you do get someone who is grateful for your input.