It's all a question of what the real risk is. From what I've been able to
find it seems that, with the red ones, there is a theoretical possibility
that someone might damage their eyes but no actual cases.
They don't have enough range.
Even if what you say is true, someone may think they suffer vision
damage (or have a pre-existing condition for that matter) and find it
expedient to haul you in for a criminal trial to set the basis for a
civil suit later (cheap and effective way to get money). And some
states may allow them to tap into a "victim's compensation fund,"
supported with taxes and fines.
The government and jury will have seen the warnings on laser pointers
and be biased that they are indeed dangerous, and along comes the
prosecutions "expert," to finish you off.
I like your idea - but I wouldn't do it.
But as long as they say they are dangerous, you won't find me staring
one down. That's a risk with no upside that I can see (little pun).
I think I read that it was now a federal offence to aim a laser
pointer at an airplane - don't know more than that (color or power
level?)
How about a little alarm clock? set the stools to squawk when it
comes time to round them up?
There are a number of ready to go products by "Ming" that use UHF and
have good range, 100's of yards if my memory is right. They make and
sell the transmitter and receivers for data applications as a building
block for other applications. All the devices can be set with
different codes for a variety of applications or control channels.
They were in the $50 price range.
I was looking at them awhile back to set up a little pager system in a
hotel where fooze ball enthusiasts compete - to know when their number
was up - only to find someone was already making a similar pager
system - used in hospitals and the like to keep track of people -
ultra cheap receivers so people can walk off with one without costing
a lot. That might be your ticket - cheap(?), high tech, and ready to
roll.
They issue these things to visitors so that they can contact the next
of kin in a hurry while on the hospital grounds - the doctors and
professionals use a different, county wide conventional paging system.
. Why twice?
