There is both this post about not being able to delete a curl, and other posts about being able to delete curls unauthenticated. Looks like you should be able to issue a DELETE curl request, to delete your curl.

Definitely reset your password/account even if you can delete it from their website. Otherwise, you are trusting a stranger with no privacy policy or reputation.

Great point, true!

You can delete the curl request if created from a logged in account.

Non-logged in curls are auto purged after 30 days.