@hgbnd hey, you could add a '#' in the link which wouldn't direct the link anywhere or play around with the css and you could take off the cursor/hand, try this:
Hm maybe you want to use the custom phone layouts feature http://laytheme.com/documentation.html#custom-phone-layouts
With that you could insert an extra carousel that you only use for the phone layout.
There is no extra setting to disable custom aspect ratio for carousels only on phone :/