Holoprojector and concealment, A clever defense or just entertaintment? Options

[FriendoftheDork]

As you may have noticed, most commlinks have holoprojectors. The holographic image they send is probably of a better quality than the Star Wars version, but still if this is to be used instead of a screen the image cannot be transcluent. The BBB says the threshold to notice that a holographic image is unreal is just 2 on a perception check, but how about using it to block line of sight?

The party hacker in my campaign (Life in the Barrens) used this trick in a narrow alley in Kowloon walled city to disprupt the line of sight of a Triad sniper f firing from a window. I still allowed the sniper to fire at them, but with -6 blind fire penalty on everyone taking full cover behind the holographic wall.

That worked pretty well, considering the party tank (Trog) had been hit twice with APDS and taken 11 damage (and drain bramage) and Uzz (gunslinger adept) was missing!

But is this a valid use of the holographic projector?