I rated a module that I don't own, just to see how it feels to own a module. I now regret it. Can I remove my rating? I'm sure it's a good module though, so I gave it a fair rating.

That's not possible for users at the moment, sorry. I have deleted your rating with super admin powers.

Another thing: How can you see a modules rating on Modular Grid? You can see it in the Google search results, so it must be somewhere on the page. I can't find it.

It's on the module detail pages. The last entry in the Specs list. Ratings will only show up if there are any available, which is not the case on many modules.

Another thing, for the Modular Grid developers: I suggest we can event.preventDefault() the "contextmenu" event on mobile devices so that you can drag and drop modules on the iPad without triggering the contextmenu every second time. And thanks for doing this site.
-- wiredearp

Not sure what you mean with "contextmenu". If you mean this speech bubble thing with the specs:
You can click on the Popover on button above the rack to prevent the display of the popover.

Beep, Bopp, Bleep: info@modulargrid.net