I've got all sorts of objections, and they were well before I earned the Burr Butt moniker here.
1. Troops have bitched about things they're issued since the Continental Army, and probably well before then. You'll probably find Latin inscriptions somewhere around Rome about a given Centurion's gladius being sub-par. If they couldn't bitch, as a commander, I'd be seriously worried.
2. I'm waiting for reports to get back to parents and friends about the horrible 40-grit issued toilet paper. Maybe some kind-hearted Good Samaritan could set up a website and ship several truckloads of Charmin Ultra Soft over to Afghanistan and Iraq. You just know it's gonna happen.
3. How does the Good Samaritan vouch that the items they're sending overseas meet Mil-Spec and GSA acceptance criteria? Is the receipt from Brigade Quartermasters the stamp of approval? A friend of a cousin of an acquaintance said they're "good"?
4. Remember the Dragonskin fiasco. Well-intentioned folks sent the stuff to their deployed family members, and it's backfired something seriously, particularly in the Army.
5. Folks laughed at the $7000.00 C-5 Galaxy coffee makers. Well, some do, but they're not the ones who witnessed or were involved in the specifications, testing, manufacturing, and procurement of said items. A little hint, it ain't a WalMart Mr. Coffee - it wouldn't survive the G requirement, the fire rating, nor the low-pressure non-explode requirement, among other things. Now that I work in a production CNC machine shop, and am looking at the things I check against the blueprints for John Deere, Harley, Culligan, etc., you wouldn't believe what hoops are jumped through with respect to customer tolerances and specifications. Add a Mil-Spec or GSA rating to it, and you can see why COTS (Current Off-The-Shelf) items may or may not be suitable for a combat environment.
6. There is no such thing as an M4 magazine, at least, not when I was issued an M4. The M4 uses M16 magazines, period. Care to guess how many M16 magazines we have in stock, both afield and new in the wrapper, probably palletized and ready to go? So we're gonna send a couple new ones? Oy-veh!
7. Are soldiers dying because of their bad M16 and M9 mags? Really? Then let's use the system in place, and get the unit armorers and others involved like they're intended. I had a bad M16 magazine during one of my qualifications - the feed lips were bent. I simply got another from the unit armorer and he 86'ed the bad one. Simple, yet effective. Shipping care packages of non-descript gear to those in the fight doesn't help much, and could even jeopardize their safety if some well-meaning mommy shipped her boy some USA Mags.
8. As a commander, I would confiscate items that had no record of passing acceptance tests. I did it before in my aircrew career, and my troops were safer because of it. They grumbled, and called me names, but that's fine. What they couldn't get through their skulls was that I talked to our supply folks and got them the stuff they needed through proper channels. Had they asked me for the items to begin with, they wouldn't have gotten mommy and daddy involved, sending unauthorized equipment.
I've got a bazillion more, but I have to head off to work.