It is more likely this. See the video, below on why a ballot worker would be highlighting areas. It also would be damn dumb to do as you claim...with a mess of frigging
obvious cameras and security walking around the area as well. I don't have those kinda guts for prison time myself. So likely it was as the video below
states...filling in 'lightly' filled boxes that the laser counter of votes rejected on the first pass through, before they try it again.
https://www.youtube.com/watch?v=rrZLC9_7gKk&feature=youtu.be&fbclid=IwAR3CMrAAr2W3V0UCru4KAGn92w2Hu0No4bgJUHFl0hH_1nYII_ulfZ382F4So anyway...this video has been investigated...and found to be NOT fraud...here is the link below
https://www.snopes.com/fact-check/pa-worker-filling-ballots/anyway, don't slam me on this, just what the links told me as well, on what was going on with the above voter workers actions, on training and the actual
video posted as fraud above. (I have a 'feeling' as the messanger on this, I'm soon to be shot! Ack!)

Brad
Biden is leading by 4million votes, if this video was true, she'd need a lot more pens. Even in PA Biden is currently leading by 15k votes, at her pace she'd need few more months to make a difference. Who wouldn't want to risk a jail sentence by knowingly doing something that wouldn't make a difference risk vs return