I respectfully request that you not ping me or send private mail to me. Please feel free to comment as you like on my posts or threads, even using my name, but, please, no contact.
Politely and respectfully,
wintertime
If you do not wish to have a civilized conversation, you should not post on public forums.
Otherwise, YOU should be polite and respectful and answer questions posed to you in a civilized manner.
The other option is to simply ignore, rather than burn up band-width with a public refusal.