Use of services like "domainsbyproxy" to conceal ownership information can be a warning sign.
Google Webmaster Trends Analysts Q&A Interview - Aleyda Solis Can You Trust Your Webmaster
If the "About Us" page mentions a different company name than the homepage, it may be a template-based "front" for an overseas manufacturer. Use of services like "domainsbyproxy" to conceal ownership