Hi Robb,
This is not accurate. "Validate Mobile Compatibility" on a "Free Form" Landing Page Template does very, very little. In fact, it only does the following:
From http://docs.marketo.com/display/DOCS/Make+an+Existing+Free-form+Landing+Page+Template+Mobile+Compati...
Must have <!DOCTYPE HTML>
Must have a <HEAD> element
Must have a <TITLE> in the <HEAD> element
Must have <META CHARSET="UTF-8"> within the <HEAD> element
Must have a <BODY> element that contains one (and only one) <DIV class="mktoContent"></DIV>
So, it doesn't add practically anything to your Free Form template's code. It ensures that the above points are in place so that if a user chooses to "Activate a Mobile Version" of a Landing Page that uses your template, Marketo can make it work correctly and build their basic, mobile view. Marketo does not add any classes to a Landing Page unless a user Activates a Mobile Version of that Landing Page. Just because a Free Form template is "Mobile Compatible" doesn't mean a user must activate a Mobile Version on an individual page itself that uses your template. It can be left de-activated (which is also the default setting).
You shouldn't instruct people to never activate a mobile view of their "Free Form" page. Free form templates are generally not built to be responsive, so without activating a custom mobile view built within the Free Form landing page editor, most pages would not look good on mobile.
For templates that already have responsive code built-in, the vast majority of our customer now leverage "Guided" mode landing page templates (>50% of Marketo Landing Pages are now Guided). The Guided landing page editor does NOT have a "activate mobile version" feature because these templates, by nature, are responsive.
For customer that have coded responsive Landing Page templates, the Guided mode pages should be leveraged.
Justin
.png)