Some practical recommendations:
- If not whois privacy, then use vitual phone number from an exotic country in whois, with an answering machine. There is no ICANN requirement for a phone number to be located in registrants country of residence, so it is safe to modify whois this way. Exotic country phone code = more expensive to call = less or no calls. A good solution for whois purposes - with still complete and correct whois - would be a phone and up to mail forwarding in ex-USSR country of Georgia, which is not a U.S. state but has the same name. Spammers may think that they are calling U.S. and will spend more money : - ). Also, last time I checked, it was very expensive to call to Georgia
- Even if you require design / logo / seo someday, never, again, never respond to them. Finding appropriate service online or offline is not a rocket science, and it is exactly what these spammers likely do for any postivie response (service arbitrage), assuming that they deliver what they promise to some extend (I'm unsure)
- Use extended spam filtering system (non gmail), on your own domain, which is offered by various email providers. It would allow to setup better filtering rules as you like. Familiarize yourself with filtering rules that may exist - SKY IS THE LIMIT. Possible rules may include for example
;If message body contains "[some country name here]-based" then move message to spam
and many, many more... You will also be able to better filter typical offers of pre-release and pendingdelete domains which a number of $$$holes sending on daily basis assuming that you'll order the domain through them.