Hide Comment Title
JonoB - September 6, 2009 - 20:30
Is it possible to completely hide comment titles (i.e. subject) for a specific content type?
I realise that I can disable "Comment subject field" in the Comment Settings for that specific content, but that doesnt stop Drupal auto-creating it from the first 4-5 words.
Any help greatly appreciated.

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remove the $title variable from comment.tpl.php
comment_subject
also check out the comment_subject module for alternatives
to get better support for your request you may follow the issue #318443: Integration with token (new branch request) (this discussion was started first in #318438: Support for other kind of default subjects)
permalink
BTW, if you remove titles from comments remember it would be nice to provide some kind of link to expose the permalink of the comment, so users be able to link directly to an specific comment