LOC will store all public Twitter posts.
Why is my tax money being used to save, index, catalog, and make available all this "data" that is, when you boil it down, 99.999% drivel and crap?
Sure, right now the message content might only be in the low terabyte range, but it will only keep getting larger and larger.
Wait, I see a money making opportunity here. I'll apply for a government grant to study how often people publicly announce that they just took a dump. This could have great impact on how municipalities size their waste disposal systems.