> Are there any health/legal problems with lasers for such application > as parking? Suppose somebody gets drunk at the sporting event > and decides to look into the laser? Even 5 mW laser pointer can > be bad for eyes. Legal liabilities could be very high I think you'd have to be *** extremely *** drunk for the blink response not to be working. And I'm sure even someone completely sodden with booze would turn away, if only out of irritation, and stagger off muttering. Anything's possible of course, and there have been some silly PC liability issues in Australia recently -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist