autocommit

This might be a wish list or add feature.
Could we add one simple switch to psql (the client front end or the
library) --noautocommit?
This will require you to type commit at the end of a query. Most of the
time I would be using
psql to do simple stuff. Some times I need to update databases. I kind
get used to the autocommit.
When forgot to type BEGIN
I some times destroy the content of certain table when updating tables.
the I have go for the backup.

Is my request reasonable or I have to cultivate a good habit?

Kemin

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