And that’s OK. Personally I found Breyer’s dissenting opinion on this matter compelling:
[QUOTE=Justice Breyer]
To permit a prosecutor to comment on a defendant’s constitutionally protected silence would put that defendant in an impossible predicament. He must either answer the question or remain silent. If he answers the question, he may well reveal, for example, prejudicial facts, disreputable associates, or suspicious circumstances—even if he is innocent. See, e.g., Griffin, supra, at 613; Kassin, Inside Interrogation: Why Innocent People Confess, 32 Am. J. Trial Advoc. 525, 537 (2009). If he remains silent, the prosecutor may well use that silence to suggest a consciousness of guilt. And if the defendant then takes the witness stand in order to explain either his speech or his silence, the prosecution may introduce, say for impeachment purposes, a prior conviction that the law would otherwise make inadmissible. Thus, where the Fifth Amendment is at issue, to allow comment on silence directly or indirectly can compel an individual to act as “a witness against himself ”—very much what the Fifth Amendment forbids.
[/QUOTE]
…Would you trust Breyer’s account?
[QUOTE=Justice Breyer]
In January 1993, Houston police began to suspect petitioner Genovevo Salinas of having committed two murders the previous month. They asked Salinas to come to the police station “to take photographs and to clear him as [a] suspect.” App. 3. At the station, police took Salinas into what he describes as “an interview room.” Brief for Petitioner 3. Because he was “free to leave at that time,” App.14, they did not give him Miranda warnings. The police then asked Salinas questions. And Salinas answered until the police asked him whether the shotgun from his home “would match the shells recovered at the scene of the murder.” Id., at 17. At that point Salinas fell silent.
[/quote]
I don’t want to argue that at all. In fact, I’d be fine with police doing what they’re doing now provided they couldn’t tiptoe past the Fifth Amendment by sort-of-but-not-really interrogating people or otherwise relying on potential perpetrators failing to explicitly invoke their rights.
I absolutely am concerned about all the things to which you allude; I just happen to be on about this thing in this thread. 
Don’t get me wrong, I’m not some hand-wringing, bleeding heart who would rather hug criminals and bemoan their poor upbringing than punish them; if they’re guilty, I want their ass in jail. I just think the government should mostly bear the responsibility of proving their guilt w/o their help.