[AZ-Observing] Laser effects

Just my in limited experience, when I've used my green laser pointer in a  
dark sky environment unless someone is standing very close to me, they can't 
see 
 the beam. And I notice that with other people using pointers I can't see 
their  upward pointed beam if they are more than 10 feet away from me. This 
again 
is  when the beam is directed upwards and in a dark sky site. I can't see 
this as  much of a problem in a star party situation. 
But as a courtesy, I don't use the pointers if there are people taking  
astrophotos (as I know what a horror a ruined long exposure is) But I wonder if 
 a 
astrophoto would be actually pick up an errant beam. I'd like to see an  
example of a green laser beam that ruined an astrophoto if anyone happens to  
have 
one.   Jeff Vandecar

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