I do not for two reasons-
1) I like a big i-max like sound stage and space my speakers wide a'la Audio Note and then aim them inward to fill in the sound stage.
2) My current speakers are a bit softer sounding and like to be aimed so you can see some of the inside cabinet walls.
I have done it in the past with a more narrow spacing and speakers that sounded best with no toe in.- e.g. a wide dispersion point source speaker.
I have heard it done w1th success at dealers and shows- mainly when:
1) Narrow room
2) Speakers sound best with zero toe angle in terms of frequency balance, sound stage and imaging. Not all speakers do.