My 12-month old's daycare minder pulls children by the arm. Is this normal and okay?

I posted this question to r/mommit just now but then realized it's not super active.​We are new to daycare so we are still trying to figure out what is normal and what isn't. My 12-month old started daycare this week. So far, I have seen the worker pull children by the arm twice in three days: once with a baby who is definitely younger than mine (could sit up but not much more). The other time it was a toddler. Both children cried and seemed scared afterwards.I am upset by this and I think I would go ballistic if she did it to my daughter. I just wanted to check if my normalmeter is well calibrated, though. Is this normal daycare discipline? Just grabbing one little hand and pulling a baby's weight when you want them to get out of the way or stop playing with something? Seems pretty rough to me.How would you address this?FYI: I created this account to post this question, since I would like to keep my parenting stuff separate from other activity. Thanks for any advice. via /r/Parenting http://bit.ly/2vkIJYp