More than 15,000 people showed up last Saturday outside the Slidebar Cafe for a "Tax Revolt" rally held by KFI-AM 640 yakmouths John Kobyalt and Ken Chiampou...and the Los Angeles Times couldn't bring itself to cover it with the exception of a lame blog post. A Times editor dismissed it in an email to a reader as a "promotional events for radio personalities," and wasn't that thought absolutely arrogant? Yesterday, the Times published a story claiming the demise of conservative talk-radio due to