Mail it to the EPA. Use someone else's return address.

I have a box with two sets of removed desmog. I think it's cool to look at, but even all the hose is suspect for cracks and dry-rot. I kept it in case it might someday have to be reinstalled to pass some G inspection, but now the bikes are so old it seems doubtful that would ever happen (so long as you don't live in one of the People's Republics States).
The short answer is NO.