I suppose it's going to depend on one's view of link lists and free sites, as in, are they completely separate entities, or does one take into consideration the inherent relationship of the two? I assume that many free site submitters see link lists as free traffic while not understanding that their accepted sites become part of the reason as to why the link lists have traffic to give in the first place.
Obviously, Google doesn't rank a free site based on strict HTML composed of numbered, untagged images and untitled links. (Who the hell wants to rank well for "36.jpg"? - though I do grasp the efficiency in numbered images.) The title tag places a keyword value on the page being linked to, much like the name of the page itself. Submitters should realize that it's better for themselves, as well as the link lists which they submit to, to make proper use of meta, title, and alt tags. It's truly mutually beneficial.
I don't really have an opinion on whether or not they should be required, nor do I have a right to such an opinion, since my reviewing has been very, very sporadic lately. The sun has been shining.
