something of a stick-in-the-mud about all this acceptance of what I see as substandard usage.

Someone at TVR once made the analogy of language use to shoes worn at a job interview. If you're interviewing for a job as CEO of Continental Draugsvold you're not going to score any points in a pair of oil-stained work boots. On the other hand, if you're looking for a job as rigger on an off-shore oil rig you're not likely to get much of a chance if you show up in a pair of $500 Guccis.