I just did a quick test and half the different methods for hiding your domain are not working at all, the rest are fairly easy to find for someone wanting to research a domain.
Here are some common methods and their actual results in google when searched with the regular domain name (ie. example.com). All of these are taken from actual examples in the forum now.
(.)com - Does not work, google has indexed the dnforum thread and shows it on a normal search.
,com - Does not work
[space].com - Does not work
(*).com - Does not work
*com -
Does work, easy to work around by searching 'example com'
(adding spaces to the domain name)[space].com -
Does work. Probably only good if the searched words have meaning on their own.
[.]com - Does not work
[space]dot[space]com - Works, but does not work for a search of 'example dot com'
So most obvious methods do not work and all your hard work will be wiped out as soon as someone replies 'example.com sold'. To hide the trail from google totally you will need to add spaces to the domain name in unexpected places and be slightly more creative
