Our domain was abruptly blocked by our registrar this morning. Our NOC team and myself tried to get in touch with them and they tell us "Contact our legal". Even I could not get in touch with anyone beyond their phone operator. The domain was restored, but as DNS takes time to restore, we are still facing issues. They later claimed there were abuse complaints about Zoho.com emails (which is our personal email service with millions of free and paid users). We received a total of 3 complaints from them and two of them have been acted upon and one is under investigation.
Once we dig our way out of this, we will find ways make sure no one takes down our domain again this way.
I run a forum site with MILLIONS of visitors and about 5,000 TB of traffic per month. Namecheap.com suddenly sent me a link warning that they will suspend my domain completely within 24 hours, if I did not delete two problem images (which were inappropriate/troublesome images but in the context of the forum posts, "a very poor attempt at humor"). I deleted the images and avoided being suspended, but the way they threatened to suspend my domain due to two images was ridiculous. If I missed the warning email or checked my email after 24 hours they would have completely suspended my domain. I'm talking about a site with MILLIONS of visitors per month and ten thousands of posts per day, not some small blog.
They may be suitable for some blog, but I can now say to NEVER use them for any enterprise site.