Rick Inman:
Buddy awareness isn't just a light issue. Otherwise we would just tie big strobe flashers to our tanks and be done with it.
Obviously, but if memory serves I was taught in DIR-F that by maintaining a steady light in your team mate's peripheral vision, he can easily tell both that you're there, and that you aren't in any distress. It goes without saying that buddy awareness doesn't end there, but my question is whether there are significant shortcomings that would prevent a laser from being useful in that capacity.
The red dot from the pointer I just got (for use primarily as a cat toy) is slightly smaller than the size of the nail on my little finger, so I'm not particularly concerned about particles blocking it. Also, because of it's relatively large size (for a laser beam)and bright red color, it's quite visible.
Since I wouldn't try to get a team mate's attention by shining a laser directly at his eyes, and since the laser is relatively low powered, I'm not particularly concerned about blinding anyone (at least, no more so than I would be with a 21W HID lightsaber beam).
The most significant shortcomings I've heard so far are that it simply isn't standard DIR equipment, which is certainly valid, and that it doesn't show where I'm looking, which I think is a pretty minor issue for the purposes I'm thinking of. It does show that I'm aware of where my buddy is and what he's doing, and I could easily use it to direct attention elsewhere if necessary.
Thanks for the replies so far, and keep 'em coming if anyone has more to add.
When I get a chance to try it out, I'll report the results elsewhere, so as not to confuse folks into thinking that using laser pointers this way is DIR kosher, which is obviously not the case.