Just so I understand how this works, I cannot assure anything based on what I perceive but you can say I'm lying about my friend who lives right near yeshiva? But I'm pretty sure that if I asked either one of those Rabbis, neither would say the word takana.
Let's get something clear.
Are you saying that your friend has been entering Bmg bottei medrash with a shtreimal for decades or not?
I'm telling you that he has not.
You can use the word hakpadah of R Shneiur if you prefer.
Obviously in today's PC world I doubt that the Roshei Yeshiva are still makpid. (But I can't be sure what you would be told if you actually sincerely asked them what to do..)