diff --git a/docs/validate.rst b/docs/validate.rst
index d59d63473..f9498377b 100644
--- a/docs/validate.rst
+++ b/docs/validate.rst
@@ -209,6 +209,10 @@ By default, no validation is enforced, but optionally, validation can be enabled
             `jsonschema.exceptions.ValidationError.cause` attribute
             of the resulting validation error.
 
+        .. deprecated:: v4.14.0
+
+            Use `FormatChecker.checks` on an instance instead.
+
 
 .. autoexception:: FormatError
     :noindex:
diff --git a/jsonschema/protocols.py b/jsonschema/protocols.py
index a8406164e..1f4384d67 100644
--- a/jsonschema/protocols.py
+++ b/jsonschema/protocols.py
@@ -74,6 +74,11 @@ class Validator(Protocol):
             against instances. Ensure you've installed `jsonschema` with
             its `extra (optional) dependencies <index:extras>` when
             invoking ``pip``.
+
+    .. deprecated:: v4.12.0
+
+        Subclassing validator classes now explicitly warns this is not part of
+        their public API.
     """
 
     #: An object representing the validator's meta schema (the schema that
@@ -171,6 +176,11 @@ def iter_errors(self, instance: Any) -> Iterable[ValidationError]:
         ...     print(error.message)
         4 is not one of [1, 2, 3]
         [2, 3, 4] is too long
+
+        .. deprecated:: v4.0.0
+
+            Calling this function with a second schema argument is deprecated.
+            Use `Validator.evolve` instead.
         """
 
     def validate(self, instance: Any) -> None:
diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index cb460474c..ea6f52b8e 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -803,6 +803,8 @@ def base_uri(self):
     def in_scope(self, scope):
         """
         Temporarily enter the given scope for the duration of the context.
+
+        .. deprecated:: v4.0.0
         """
         warnings.warn(
             "jsonschema.RefResolver.in_scope is deprecated and will be "