BFG10K
Lifer
That makes no sense whatsoever. Thats like saying an SSD or HDD will corrupt itself if you give it an extreme workload.They're fast when they're working, but still finicky and prone to errors. Not to mention, RAM sectors do go bad and using the RAM like a HD just puts that much more stress on those components, as well as the memory bus. - make sure you have decent heatsinks/coolers for your RAM.
If the RAM passes the error tests then it should be stable no matter how many times its accessed or written to. If its not then you either have faulty RAM or your system has some other issue (e.g. overclocking).