As a follow up, what are the pro's n con's of adding to allowed attributes?
One thing I would like to do is add "id" to allowed attributes for DIV?

I can see how this could get out of hand but don't know the implications good or bad.

you can add id & style by changing the setting in conf/_formatting.php

# Set this to true to allow id && style as core attributes for posts
$posts_allow_css_tweaks = true;

¥

Thanks mate, now I understand what that really means

What it really means is that I got fed up of editing _formatting.php every upgrade to manually add the attributes ;)

¥

Your not wrong there.... You almost have to keep a diary on your formatting fiddles :)

Hehe lawlz. I already have a few files with edits strongly noted so I don't forget. At least it is fewer now :p

Just keep the comments stuff to not allow, that'll keep the commenters out of the risky elements and attributes.

Just keep the comments stuff to not allow, that'll keep the commenters out of the risky elements and attributes.

absolutely