Ok, I reported it on the FBI tips. I will call Santa Monica police tomorrow. The B&N security guard didn't say much of anything. I pointed him out and he said he would keep an eye on him. I am surprised nobody noticed him before me. He was acting very strange - nervous, looking around but clearly not for books or coffee. I spotted him right. I guess most everybody else in the coffee shop was too buzzed on coffee. I should have gotten the phone number of the guy who got sprayed since he will probably be the first to die. :-)
I am glad you reported it.
Talking about spraying, I just came across this article and posted it:
DEADLY STUN GUN THAT FOOLS AIRPORT X-RAYS (can also spray CS gas)
http://www.freerepublic.com/focus/f-news/1347103/posts
"The gun, which paralyses with a 50,000 volt shock, can also spray CS gas and could become a favoured weapon of terrorists. It was found during a routine baggage search at Heathrow after its owner had passed through X-ray checks.
One airport-based detective said: "This is a major cause for concern. This stun gun is sophisticated and in the wrong hands lethal with potentially disastrous consequences."
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Of course if it can spray CS gas, it can spray anything else too...
Also, FoxNews had a special on Saddam's bioweapons, that they were making them in spray form and had a lot of perfume bottles, presumably to use those to spray the stuff.
So, seeing anyone spraying around a public place is definitely reportable.
You did the right Avenger.
Now, before going to sleep, write down the description of the guy with the spray bottle.
That is because hardly anyone in LA says HI to anyone anymore....everyone avoids eye contact and keeps their heads down.