A RESOUNDING NO!
Build a frame with foam backing and use clips and push pins (you've seen my frame). You can even do a wood ledge so that the clips hide underneath (if the clips bother you.) There are many ways to do this without killing the poster.
T
I generally disagree. T, you have an incredibly large collection so storage space is an issue and you generally do not display, so having (especially large formats) linen doesn't really help your purposes with collecting. Also a good restorer doesn't 'kill' the poster, that is just wrong information. The poster might be 'killed' for you bc you don't want it on linen but many folks do and pay more for a restored version of something, which EMP proves time and time again.
I would argue that folks with a small collection/handful don't mind or actually prefer larger posters (or multi panel pieces) on linen because of the obvious: they want it to look the best as a display piece.
I generally understand the hard core collector's mentality of having a poster as it sits, unaltered. I am in the middle here, but in terms of 3sh and larger, I will put something on linen as I like to rotate them in my larger frames. I also have purchased several pieces at a good price because of their condition and do feel good/right about having them restored. Now they do not deteriorate further and future generations have the possibility to enjoy. Ultimately, a good backer treats the poster with respect...all the restoration can be reversed if a future owner so chooses.
I would be careful throwing out terms like 'it kills the poster'...I don't think first class restorers like Dario, Mario Cueva, etc think they are destroying movie posters, because they are not.