Tim, that is a very good point.
But at the same times, those that are doing the warning must have pretty thick skin and not take it personally when someone do not believe them and also get the information across without coming across as a lunatic. It's like going to a store and there is a dude outside saying that particular store is a rip off and you shouldn't buy there. Many will shake their head and go in anyways, some will probably tell him to shut the hell up, some may stop and listen but still go in, some will turn around and go somewhere else, and some might just ignore him like he isnt even there, and some will ask for more information and inquire about it. Now lets say, this guy is at every store every gas station, every movie theater talking about the same store from before and how it's a rip off, would the reaction different even though he has a noble cause in preventing people from facing the same fate as him? Probably similar. Now suppose he start heckling the people that decide to go in anyways and calling them Big chain store puppets and other names? How would the reaction and perception change even though the goal and the cause is still noble? The perception probably will be very different and less people will probably even bother listening to what he has to say even though he may be on to something. Food for thought.
Ah, yes, that heckling... the less-lethal version of humanity's urge for warfare against what is different. I'm not aware of much of that kind of thing going on, except for reactions to people who have come down on Titan/SaveCoH with the standard "Get over it, it's just a game" package of insults.
I'm not even sure if the store ripoff is a fair analogy though because of the nature of the product. Stuff you get from Walmart doesn't typically demand years of commitment and hundreds or thousands of dollars. If you get a crappy microwave that breaks in a year, you're not out much of anything besides maybe $100. You can get another one, from a different company, from a different store, and not feel empty due to the loss of the old oven. Nobody out there is going to whine about not being able to find another good microwaving experience.
You're into cars though, so you could draw a better similarity to that. There's a type of product that people are more picky about, and the experience gets factored into the purchase. Let's say your favorite model ends up getting discontinued. But there's nothing to stop you from continuing to drive that car. Even 50 years later, it's possible to hunt down parts, repair/refurbish, and keep those classics running. There's no EULA telling you that you can't modify the car.
To take the store comparison example a bit more closely, perhaps it's just that software hasn't caught up to other forms of business yet. We DO fear physical things breaking too fast, either accidentally or by intentional design (planned obsolescence). This is why more expensive products come with warranties. That's a guarantee that the product will persist for at least X # of years, or you'll be compensated. Nobody has ever thought to do that with software because usually all it takes is a reinstall, even if your computer blows up. And even if you lose your original disc, it costs the company a few cents to send you a new one, or just give you a download link. But MMO's have now changed that, and the life-expectancy of many of the newer ones are becoming hideously short. Perhaps a warranty will soon be needed on software that needs a remote server to function. A promise that the company will support the game for a minimum number of years. That probably won't happen though, because the audience isn't smart enough for that. Not the audience the companies care about anyhow. Their target group is the impulsive tweens who don't bother with long-term planning, and don't even have to manage their own money.