I install it on every site and use it rather than PhPMyAdmin. But I'm thinking I should remove it from production sites.
Should a hacker gain access to any admin account, using Adminer they can not only dump the db, but alter it and take over.
I'm a dev and my clients always want admin access and sometimes for people who should stick to paper and pencils. Yes, I can restrict access to Adminer to only my account or the "root admin" but there is still the chance of my account getting hacked. Not very likely with my huge and random passphrases.