The 4th amendment already exists and is ignored by the federal government (e.g. the border search exception [1]).
Passing another amendment will accomplish nothing, it will get ignored just like the 4th one.
Passing another amendment will accomplish nothing, it will get ignored just like the 4th one.
We have no shortage of laws already. Including many laws that (on paper) protect individual rights. All of those laws are routinely being ignored. They don't mean anything.
The constitution is meaningless. The bill of rights is meaningless. International human rights treaties are meaningless. All that matters is what happens in practice.
If individual rights exist in a country, it's because of how society and the government operate – not because somewhere, there's a piece of paper that says so. A democracy can turn into a dictatorship without a single law having to change.