Forums / Cotonti / Core Labs / Ideas / core change for comments (SEO)

Thanks to Kort, I became aware of the following:

Comment spamming article

We should make something to prevent this always..
It will keep our sites clean from those ppl

e.g.
When saving the comments, then make every url a link with a rel="nofollow" tag

this should be simple to make with regular expressions in the submit part