diff --git a/README.md b/README.md
index a67da88..7fd1603 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ drf-tracking provides a Django model and DRF view mixin that work together to lo
  Model field name | Description | Model field type
 ------------------|-------------|-----------------
 `user` | User if authenticated, None if not | Foreign Key
+`username_persistent` | Static field that persists the username even if the User model object is deleted | CharField
 `requested_at` | Date-time that the request was made | DateTimeField
 `response_ms` | Number of milliseconds spent in view code | PositiveIntegerField
 `path` | Target URI of the request, e.g., `"/api/"` | CharField
@@ -153,6 +154,8 @@ class LoggingView(LoggingMixin, generics.CreateModelMixin, generics.GenericAPIVi
     sensitive_fields = {'my_secret_key', 'my_secret_recipe'}
 ```
 
+By default drf-tracking allows API request log entries to be modified from Django admin. This can present a data integrity issue in production environments. In order to change this behavior, you can set `DRF_TRACKING_ADMIN_LOG_READONLY` to `True` in your `settings.py` file.
+
 ## Testing
 
 Install testing requirements.
diff --git a/rest_framework_tracking/admin.py b/rest_framework_tracking/admin.py
index cd38f81..052dd0a 100644
--- a/rest_framework_tracking/admin.py
+++ b/rest_framework_tracking/admin.py
@@ -1,3 +1,4 @@
+from django.conf import settings
 from django.contrib import admin
 from .models import APIRequestLog
 
@@ -12,5 +13,11 @@ class APIRequestLogAdmin(admin.ModelAdmin):
     search_fields = ('path', 'user__email',)
     raw_id_fields = ('user', )
 
+    if getattr(settings, 'DRF_TRACKING_ADMIN_LOG_READONLY', False):
+        readonly_fields = ('user', 'username_persistent', 'requested_at',
+                           'response_ms', 'path', 'view', 'view_method',
+                           'remote_addr', 'host', 'method', 'query_params',
+                           'data', 'response', 'errors', 'status_code')
+
 
 admin.site.register(APIRequestLog, APIRequestLogAdmin)
diff --git a/rest_framework_tracking/base_mixins.py b/rest_framework_tracking/base_mixins.py
index f00ef37..8b167be 100644
--- a/rest_framework_tracking/base_mixins.py
+++ b/rest_framework_tracking/base_mixins.py
@@ -68,6 +68,8 @@ def finalize_response(self, request, response, *args, **kwargs):
                     'method': request.method,
                     'query_params': self._clean_data(request.query_params.dict()),
                     'user': self._get_user(request),
+                    'username_persistent':
+                        self._get_user(request).username if self._get_user(request) else 'Anonymous',
                     'response_ms': self._get_response_ms(),
                     'response': self._clean_data(rendered_content),
                     'status_code': response.status_code,
diff --git a/rest_framework_tracking/base_models.py b/rest_framework_tracking/base_models.py
index 56eed69..9bbefbd 100644
--- a/rest_framework_tracking/base_models.py
+++ b/rest_framework_tracking/base_models.py
@@ -14,6 +14,11 @@ class BaseAPIRequestLog(models.Model):
         null=True,
         blank=True,
     )
+    username_persistent = models.CharField(
+        max_length=getattr(settings, 'DRF_TRACKING_USERNAME_LENGTH', 200),
+        null=True,
+        blank=True,
+    )
     requested_at = models.DateTimeField(db_index=True)
     response_ms = models.PositiveIntegerField(default=0)
     path = models.CharField(
diff --git a/rest_framework_tracking/migrations/0008_auto_20200201_2048.py b/rest_framework_tracking/migrations/0008_auto_20200201_2048.py
new file mode 100644
index 0000000..a0a644d
--- /dev/null
+++ b/rest_framework_tracking/migrations/0008_auto_20200201_2048.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 3.0.2 on 2020-02-01 20:48
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('rest_framework_tracking', '0007_merge_20180419_1646'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='apirequestlog',
+            name='username_persistent',
+            field=models.CharField(
+                blank=True,
+                default='',
+                max_length=200,
+                null=True
+            )
+        ),
+    ]