joomla technical support
RSForms Pro has a built in plugin for using recaptcha. RSForms Pro version 1.4 includes a responsive layout.
However, the included recaptcha plugin is not responsive. In our opinion, recaptcha spam protection is critical for forms, unless you want to spend your day deleting emails and then clearing the submissions in the Joomla backend.
Akeeba Admin Tools does a great job securing our client's joomla websites. Komento is our current go-to commenting extension since it integrates with Joomla articles and K2 items.
However, we have found that Akeeba Admin Tools is doing too good of a job and actually preventing Komento's "AJAX" calls when a post is being made.