Not as GEDCOM compliant as using NAME. _AKA as a tag is probably the most widely used non-standard tag, but the additional NAME tag has far more flexability in the standard than a single _AKA tag.
Like I said, not everyone will agree with me, but it is what I use and is supported by FTM2012.
Like I said, not everyone will agree with me, but it is what I use and is supported by FTM2012.