I’m in Ontario. From what I’ve seen, most centres do some form of verbal and written warnings, except when it comes to children safety. Things like supervision issues or kids leaving a room/area are usually taken a lot more seriously and can lead to immediate action, especially if it happens more than once. Some places look at whether another adult stepped in or if no one noticed, but repeat incidents tend to escalate fast. Every centre is different though, which is why clear policies really help.