We've had to place a policy that limits discussion of specific registrars by name, because such threads have been abused for promotional purposes.
Form the Forum Charter [webmasterworld.com]
Specific Registrars
On today's web, registration has been deregulated and registrars
are no longer limited to a few select businesses. Instead we have
seen the rise of many all-in-one businesses who will register,
host and help to market your sites all in one stop. Because of
this shift, we ask that you do not discuss specific registrars,
just as we long ago disallowed discussion of specific web hosts.
We can have a more general discussion - What do you look for in a registrar? What are some problems I should guard against? etc. But all without naming names, OK?