There was kind of a similar thread on "the other big knife forum" some years back, a new guy was really worried about long term storage of his fixed blades, in their sheaths, in his closet or somewhere. I took a few of mine out that had been laying around for at least a few years to check for problems and none presented.
That's somewhat different, since we all know there are some minor precautions when storing knives to ensure that they won't get any corrosion and such, but still. He was still really worried about it even after myself and some others showed him some photos of "long term storage" fixed blades. If I was really that worried about it, I would just get rid of the knives altogether. Not worth it. In fact when I did start worrying about my collection size and found myself worrying more about some knives that enjoying them, I pared it down and gave a lot away. Might as well go to some people who will use and appreciate, rather than me worrying over them, which sucks all the joy out of it.
Sometimes no amount of info or reassurance is gonna help with this stuff I guess.