How to allow users to delete their own comments?
To allow users to delete own comments you need to log-in into the wp-admin->RateMash->Settings
In the Settings you need first to click on `Comments` and then by clicking on a text field you’ll gain an ability to delete own comments. You just need to put a drop-down in the “Yes” status.
Save your modifications with the according button “Save Changes” at the bottom of the page.