I'm not an alien invader

[plasmid 39]

As starlight falls and suns all die

I'm flying in saucers unseen

Propellered guard is whizzed right by

With teleportation beam

A migrant motley columned crew

Arranged with a common intent

Starts squelching scores of voices who

Are trumped by the one I invent

My phantoms land and fight their war

The people will surely succumb

'til daylight breaks then off I soar

I'm saved or I'm killed by a thumb

[tiger_lily111 116]

A, I don't believe you.

are you playing ultimate frisbee

D, interesting as always. I'm sure I'll try again later assuming I haven't been body-snatched.

['Cat'astrophe 0]

a firefly

nyeah..more like a mayfly

[tiger_lily111 116]

staging a play

[plasmid 39]

A, I don't believe you.

Can't say I blame you, I did have an "I'm not a plasmid" riddle after all 8P

staging a play

That's the closest guess so far, but there are clues in the first stanza pointing in a slightly different direction.

['Cat'astrophe 0]

a videogame

[Pickett 11]

Watching a movie or tv...(also, Cat's guess of playing a video game definitely fits this thinking as well...)

The first stanza kind of sounds like the lights going down and possibly a DVD in the player started by a remote control.

The second stanza seems to describe the pixels on the display and then when the movie starts, people who are talking quiet down.

The third mentions how people will be fixated at the screen and then about turning it off via remote (using your thumb)...the "saved" line is what makes me think Cat's guess is probably more right...

[plasmid 39]

This reviewer gives Pickett's answer a thumbs up.

Old-fashioned movie reel

As starlight falls and suns all die

I'm flying in saucers unseen - movie reels, in the projector's booth out of sight

Propellered guard is whizzed right by - mechanism of displaying the frames on original projectors

With teleportation beam - the projected beam of light

A migrant motley columned crew

Arranged with a common intent

Starts squelching scores of voices who

Are trumped by the one I invent - fits better with a public performance than something at home

My phantoms land and fight their war

The people will surely succumb - crowd typically just sits there and watches

'til daylight breaks then off I soar

I'm saved or I'm killed by a thumb - the thumbs up or thumbs down of reviewers