Don't take it to heart your not the only one that we crack on really. You should see some other posts of others, yours is really lenient .
Glad to have you as member , you have to admit it was funny though doesn't hurt to laugh. You'll get your chance to crack on someone too.
I've had that question for a long time, ever since he first joined. My first member name here was Wadsworth, from a reason I don't understand, maybe just the first questions I had about high power IR, that was thought to be a troll right from the start when it was just the name of a city I was living in and my questions although naive, were sincere.
The divergence of a 700-1000 mw green laser diode using a 6 mm lens is approximately 2.6 mRad, that will spread fast, using the figures I choose shows about almost 40 meter diameter beam after 15km, but the calculator I used does not take into account both the fast and slow axis, there are actually two different divergence figures due to this.
Put a 10X beam expander on the laser and you can divide these numbers by ten, but it really doesn't matter what the figures are, if it does what you want. I am not completely sure what the divergence will be for the lens you choose, this is based on a G2 lens which does not have a long focal length and thus greater divergence than some lenses.