I'm in one of those weird moods where I want to see if I can argue something that sounds weird at first. If that's not your thing just ignore this post.
Putting pressure on ICE isn't going to change anything. Institutions cannot be trusted to reform themselves. In fact, it's going to be worse than doing nothing. The people involved will feel like they have "done their part" and will do fewer useful things in the future than they would have otherwise, mostly because they wasted their time on this thing.
Pressure has to be put on congress to reform ICE. Anything that distracts from that, or makes people feel a sense of accomplishment without furthering that goal is worse than useless.