School boards go after anglophones. They take out full-page English-only ads in the Toronto Star encouraging parents to put their children in the French system. However, once that right has been granted, there is no oversight. They are given the password to get in. It's akin to giving someone a test but giving them the answers first.
There are exceptions. I have a lot of anglophone friends who are very committed. One in particular took her children to Quebec on vacation to expose them to a French environment. Nevertheless, it is a small minority. The others just want to be allowed in, and once that happens, their commitment fades.
Even schools tell parents not to worry, saying they will take care of it. Take care of it, my foot.