Assacre

I forgot most of what I once knew about the one-man band Assacre.
1. His mask to shirt ratio was usually 1:0.
2. His amplifier was relatively small.
3. Did I mention that I forgot most of what I once knew about him?
4. His real name was Ben Aqua.
5. He played guitar along to pre-recorded bass, drum machine, vocal and rhythm guitar tracks.
One man bands are a difficult thing to pull off.  For one thing, there's a lack of a visual element for an audience.  Generally, when you're watching a band, your eyes will maybe go back and forth from one band member to the next (unless you're at a White Stripes show and you're a heterosexual male {shut up, admit it}).  You can't really do that with a one-man band.  Also, there's an irreplaceable synergy between band members when they are connecting on that level.  The entire process in that regard is similar to sexual intercourse.  You can do it by yourself, but it's better if there's more than one person in the room.  Going further, you have to be really good at it to make people want to watch you.  Assacre was really good at it (I'm talking about playing music, pervert).
Ben Aqua was active in this band for either a few months in 2004 or several years between 2002 and 2008 (see #3 above).  He once posted a sendspace link to one of his albums on myspace, if that gives you an idea of a time frame.  This is not that album:

 Also, he used to cover "Muscles" by Diana Ross.