Is there a way to mask my real server technology say from PHP to show up as Python when checked by sites like http://builtwith.com? Or at least to not show anything at all?<
I think they test some path those are unique path for CMSs and index your website info in their databases. I try to use "IP Deny Manager" in Cpanel to denny IP of those domains in order to prevents from unwanted indexing by those sites.