I almost never take up an offer by conference organisers
to publish a paper in their proceedings. I think such
proceedings have passed their use by date because:
* They usually appear 6 to 18 months after the conference.
By then most of the papers have already been published elsewhere
* Almost all conference papers seem to be cut-and-paste versions
of papers that the authors have already published or about to
* Most proceedings are published by mediocre journals.
* One of the main reasons some people publish in them is to pad their
publication lists and keep bean counters happy.
* The only conference papers I tend to read are review articles based on plenary talks by leading scientists. But, most of these I get off the arXiv.
Given all of the above I think conference proceedings are just a
waste of time for the organisers, referees, and authors.
We should all exercise more self-control and abstain.