'Only mentioned in conference proceedings' is actually a fairly decent criterion for exclusion from a general encyclopedia - which is the sort of thing all the deletionist/notability teacup storms revolve around.
The importance of conference proceedings in distributing CS research doesn't seem particularly relevant.
What? You seem to be very focused on being upset about something and I can't quite follow what it is. Have you read any of the endless verbiage on notability?
There is a (hotly debated, etc, etc) wikipedia policy that article topics have to be 'notable'. If a topic is only covered in academic literature, one can make a perfectly sensible argument that it's obscure and not 'notable' enough for a general encyclopedia.
You don't have to agree with the policy (I, personally, am totally indifferent to the whole topic) but you write as if the very idea that something that's only mentioned in conference proceedings is obscure (CS or not, doesn't seem all that relevant either) is somehow irrational and worthy of great indignation.
It's relevant to CS because in CS, unlike in other fields, conference papers and proceedings are the main way to report on findings. In other fields conferences take a backseat to journals; CS is unusual in this respect.
As for the broader issue of whether academic entries are notable, surely the massive body of mathematics entries on wikipedia indicates that material which is never mentioned in the newspaper is notable.
The importance of conference proceedings in distributing CS research doesn't seem particularly relevant.