if you have an athletic subscriptions, i highly recommend reading this. the writer interviewed a "Sign stealer" for a power 5 program.
theathletic.com
i've been saying this all along and this quote sums it up perfectly:
“The clip circulating, I’m like, shoot, that looks like every sideline I’ve been across in America,” he said. “I just think people don’t pay attention to it."
"The lack of awareness about this practice is what’s baffling to our signal stealer, especially given some of the extreme reactions he’s seen over the past week. Again, there’s a clear difference between what Michigan is alleged to have illegally done and what other coaching staffs traditionally do to steal signals. But those who are offended by signal stealing should pay a little attention to their own sideline.
“The average fans who are crying, ‘Oh my gosh, look at them cheat!’ Well, wait ‘til you see your team do it,” he said. “Because I promise you they’re gonna do it this Saturday.”

10 lessons of a college football signal stealer: What to watch for and how not to ‘get got’
A signal stealer at a Power 5 program that does not have Michigan on its schedule opens up on how this game within the game actually works.

i've been saying this all along and this quote sums it up perfectly:
“The clip circulating, I’m like, shoot, that looks like every sideline I’ve been across in America,” he said. “I just think people don’t pay attention to it."
"The lack of awareness about this practice is what’s baffling to our signal stealer, especially given some of the extreme reactions he’s seen over the past week. Again, there’s a clear difference between what Michigan is alleged to have illegally done and what other coaching staffs traditionally do to steal signals. But those who are offended by signal stealing should pay a little attention to their own sideline.
“The average fans who are crying, ‘Oh my gosh, look at them cheat!’ Well, wait ‘til you see your team do it,” he said. “Because I promise you they’re gonna do it this Saturday.”