I think @sremick's main point is for those who use the lag fixes need to read through the forums and especially the developers' posts before doing so. If you have and have weighed the options/consequences then you apply the fix in full knowledge of what MIGHT happen and deem the risk worthwhile, and so shouldn't complain if the internal SD gets fried. He is not saying bad things will definitely happen, just that they can, and the way these fixes work can sometimes fry the SD card (internal or external) or whatever it is using to reroute allocation through. It is the same as flashing ROMS really (especially back in the G1 days), in the early days a fried SD card was always a possibility that loomed with each flash and application of "swap" space...
All he and others are saying is to be careful, conscientious, and know that just because something has been made easy that doesn't mean it is bulletproof.
Example and a small tirade/background discourse:
Just today at my local ATT store a guy was buying an Aria and a Captivate, and he asked the associate about "root" to make the phone better, but had no clue what "root" even meant (he made the usual comparison to "jail-breaking" the iPhone, and the associate agreed with him)! I politely (as well as I could) went over and explained Linux, then Android, then what Root and Super-User mean, and the potential vulnerabilities associated with it, and gave several forums that I told him he needed to read before even thinking about it, and all he said when I was done was to ask if it will make the phone faster/better. The issue here is like driving without giving an official driving test- most of the people will eventually figure it out and get moving, but at what cost in the meanwhile to their own "vehicle"? I am really torn between whether "one-click root" should ever have been made for this reason, it distances the consumer from what they are doing with their phone, and creates the potentiality of major issues down the road; on the other hand, it makes it accessible to people who are not programmers/developers (like me) and who might not have the time to learn the ins and outs (but therein lies the problem). It is like a car that someone buys, has a new souped-up engine dropped in it, with no mechanical know-how or background knowledge on the engine or the car as a whole now. They can't get the dealer to fix it, they can't fix it, so they have to rely on others to fix everything, and it only creates tension when and if there ever is an issue with performance.
While I think rooting/modding is a wonderful option that all phones/operating systems should have, I am worried that it is becoming trendy and little-understood by those who want/seek it.
sorry that got a bit long-winded