Ever read Kim Stanley Robinson's Red/Green/Blue Mars SF trilogy? I'd be surprised if you hadn't.

I think I can guess which side you'd be on in the same argument, developed through those books, as seems to be unfolding here. In Robinson's context, the Reds advocated keeping Mars 'pristine' for purposes of scientific study; the Greens pushed terraforming on the shortest possible schedule. Each side had good hard reasons for its stand; both are eventually trumped by the planet itself. (hope that wasn't a spoiler)

As for me: I'm a Red.

If we go to other celestial bodies in order to learn, we learn less if we obscure the facts with our own clutter - worst of all, if that clutter isn't sterile and the planet or moon in question has atmosphere and moisture, we have irrevocably altered our certainty that any life discovered has non-terrestrial origins. On the other hand, if the only way humans are eventually able to justify manned space travel is need - resources, population pressure, etc. - then concerns about the natural state of other worlds won't be cost-effective. Gripping hand: trash is unavoidable; 100% reliability of any system, human or automatic, is unachievable.

Nipper Wolf put it pretty well; if I may paraphrase, it's a matter of attitude.

Mind you, I'm not equating your personal investment (or anyone else's) in "Trailblazer" with trash, per se. Like the plaques on the legs of the Apollo landers, or the disk attached to Voyager 2, the disk, the mementos and the business cards (business cards? - LOL, how '80s...) are hitching a ride. As a writer, I certainly understand the human urge for some form of immortality, some chance to say "Kilroy was here", the longer-lasting the better. I can also understand TransOrbital's commercial exploitation of that urge to defray, even in a token way, its own costs. You and your fellow 'investors' get absolutely no tangible ROI, but you may be contributing to the future of us all if TransOrbital doesn't become just another wisp of vaporware.

By the way, did you read this, from TransOrbital's 'Products" page (embedded in the copy about mementos):
Note: due to the velocity at which the 2001 TrailBlazerTM spacecraft will impact at the end of the mission, as well as the unknown nature of the lunar surface at the point of impact, no guarantee can be made as to the state of the payload following its arrival on the surface.