Talk about mixed feelings: "...Established in 1941 by Franklin D. Roosevelt...." Well, it was the sesquicentennial.
Though many of the provisions of Bill of Rights (and even more so, what the courts infer from them) have been and are contentious , I've long been bugged by the lack of provisions for enforcement; it'd be nice if The Gummit was risking something other than a lawsuit  when they went stompin' on activities protected under those Amendments.
Then there's the other problem: exactly as some critics predicted back in the 18th Century, the perception has emerged that the Bill of Rights grants rights, rather than protecting them and that the specially listed rights are all a citizen gets. I am well-nigh certain that the flip side was that had those Amendments not existed, the rights they protect would have long ago been eroded to nothing; but I'm pessimistic that way and believe in getting things in writing.
Whatever. Y'still otta celebrate. Me, I think I'll read the 'net and the paper, carry a gun  and maybe even make some noise about the way Uncle Same keeps pushin' away at the Fourth Amendment.
Update: Meanwhile, the Obama Administration is celebrating Bill of Rights Day by pushin' to expand the de facto FedGov immunity from prosecution if the CIA thinks allowing the case to proceed would endanger state secrets. ...Yeah, it sounds almost okay, why give the bad guys a way to learn what our side knows, but geez-o-peet, we'd better find a way proctect sensitive intel, methods and sources that doesn't hand the Feds a free pass. The courts are trying to figure it out; I hate having to bet on the wisdom of judges but we're down to that. (And yes, I fully expect to be lectured about my ignorance by the "but they're our jackboots" crowd; 'cos they'd never Horiuchi your wife and child, right?). The only good side is the way it makes President Obama's former boosters cry.
1. Be Careful What You Wish For: It's an easy shot to sneer at some of the thinner threads of legal logic but considered as a series of limitations on the government -- originally limiting just the Feds but expanded under the 14th Amendment -- the more broadly the courts construe the rights protected by the Bill of Rights, the better off we are.
2. It's tough to win a court case against an entity that buys attorneys by the barrel; contrarily, if there were some nice language about how violatin' the BoR in an official capacity was a capital offense, Our Public Servants might be moved to think before acting.
3. Some -- the Skunk Works does have some silly rules that way. Sigh.
4 months ago