It's more profitable to do so. For every unfair billing exposed and corrected, there are probably thousands unheard of. They make more money keeping that. And, what do they care if their reputation is sullied? For so many people, there are only inadequate alternatives, if any.
One vendor I know personally went berserk that people were reselling his pet care product on eBay, and threatened lawsuits all around - when in actuality, his product was made by SOMEONE ELSE. He bought it wholesale, repackaged it, and sold it at triple the manufacturers price.
I, also, am a great believer in "none of the above." We haven't had a vote-able candidate in decades; let's make the parties offer different choices until one IS viable. Having the office vacant through years of failed elections may teach us if we actually NEED anyone in there making trouble...
I didn't think it was possible for me to care less about the Olympics... but now I see I was wrong. Let's ignore the IOC and USOC - literally. Don't answer their calls, return their letters unopened. Go run and swim and play somewhere else. Call it the Orympics.
Of course, whoever organizes THAT will eventually become evil and corrupt, but we'll have a respit for a few years.