meaningless. If an observer is 100 ft from the polling place they will see absolutely nothing. Can't see what could this will do.
[Anti-DEM-Voter-Fraud Sarcasm Torpedo ARMED. FIRE!]
You know, with video camcorders and / or cell phones, we could take quick photos of vans full of--well, possibly bussed-in 'rent-a-votes' and forward the license #'s and pictures of the occupants to other voting places in the precincts.
Then, when it is clear the same van with the same people is stopping at two or three different polling places, either
a) post on the internet and go challenge to votes;
or
b) first slash the van's tires or siphon gas out of the tank (hey, the people are ALREADY at the polls, so no prevention of votes!) and then have Pubbie volunteers drive the people home. While on the way, get chatty and see what they say, and make a note of the home address to match against information on file for the name they voted under.
c) If Union thugs try to beat you up, you have instant national coverage for FOX News...