[Wings69]

For anyone wanting it in quick reply - I have a dirty hack that does the job. I couldn't get the IF statements working however, so if you disable anon posting you will have to remove this manually. Perhaps someone smarter than me can do something better

Edit the SHOWTHREAD template. Find:

<label for="cb_signature"><input type="checkbox" name="signature" value="1" id="cb_signature" tabindex="5" checked="checked" />$vbphrase[show_your_signature]</label>

Below it add:

<div><input type="checkbox" id="cb_anonymous" class="bginput" name="anonymous" value="1"  <if condition="$vbulletin->GPC['anonymous']">checked="checked"</if>/>$vbphrase[zointsanony_anonymous_post]</div>