Wrong
You do never ever reply, ever.
You can effectively avoid cease and desists this way also, as email is not sufficient evidence of receipt.
Best way?
Start LLC for your company
Process with said LLC...
Transfer all hard assets (homes/cars/property that you buy to avoid paying taxes on profits, etc) to another LLC, in that LLC place the assets into a small interest bearing trust.
if you get eventual trademark claims (trust me even with huge companies, and 100ks coming into your company, this can take months to raise red flags)... you simply file for bankruptcy on LLC #1
The investments in the trust can be charitable and ergo, impossible to touch.