This can remove unwanted params from your POST reqs.

Add this to your applications Gemfile:

gem 'rack-remove-param'

And run:

$ bundle

In config/application.rb

config.middleware.insert 'Rack::RemoveParam', 'should_group_accessibility_children'

Where 'should_group_accessibility_children' is the param you want to filter.

To filter multiple params:

In config/application.rb

config.middleware.insert 'Rack::RemoveParam', ['param1', 'param2']

Where 'param1' & 'param2' are the params you want to filter.