I suspect those who love the "glory" of beat-up, misaligned, crappy-looking posters keep them in storage all the time and glance at them once a year at most.
No offense taken Steven. To each his own.
This is simply not the case for me, Mel. Many, if not most of my posters on display have signs of use. In some cases, there is considerable wear. A lot of defects are edge damage, and this is either covered or greatly minimized by frames. A lot of the rest is covered by the 5 foot test. The poster displays well at 5 feet, but the defects can clearly be seen when you get close.
I probably wouldn't display something in really poor shape unless it was iconic. However, I would personally prefer to display such a poster with defects than have it over restored and be displaying something that has lost its sense of history.
Again, this is just me and I can't afford to collect at Mel's or Brian's levels. If restoring posters gives you joy, then go for it, but my strategy works for me at my more humble level. I take pleasure in the fact that my collection is preserving history, not altering or erasing it.