I'm not sure, but I believe the poster W2020 wishes to depict the counting of 2020 ballots at the TCF Center in Detroit. If not the TCF Center then what follows ain't applicable to W20's post.
But, if it is.....here is some context:
Detroit allows 'observers' or 'challengers' to roam the counting center (all ballots in Detroit precincts are transported to a central counting room, rather than each precinct doing its own counts). But each party is allowed so many observers in the room.....134 each. That limit had been reached fairly early. But, in fact, more than 268 people came into the counting room and wandered among the counter's tables. And not all of them were polite, respectful, responsible. The counters have a job.....and some observers began being disruptive, harassing and video-taping the counters.
One jackass, a Republican observer, walked around in a full-face Guy Fawkes mask.....until ejected. As the disruptions persisted the authorities ejected the excess number of counters in order to get the numbers back down to a total of 268. Those ejected in that process and now outside the counting room began to bang on the windows and disrupt the process even more. The counters complained it was interfering with their work. Hence the taped-up paper screen on the windows.
Note: there were still 134 Republican observers inside the room, along with 134 Democrat observers.
Now, the poster, Weatheman 2020, simply may not have known of the procedures for the centralized Detroit count. Or, if he did, he is being disingenuous in an attempt to put a MAGA spin on the circumstances....as if the counting, and the count, were intentionally be secretive.