I suspect the tool you are referring to is keepright ( [http://keepright.ipax.at/]) and is indeed a very useful tool to find various different “bugs” in the data.

However automatically correcting things via a bot, or spamming people with error messages they haven’t asked for is imho a bad idea. I would rather try and promote the various Quality Assurance tools ( [http://wiki.openstreetmap.org/wiki/Quality_Assurance] ) more prominently.