LMAO just like the one you just made.
I think they're very useful, since they're my bailiwick. But it's also important to know what they're actually saying. A good sample is very hard to create; it's not the same as a random selection.
Usually I don't make a big deal about how the sample is made, although I do often if it's an opinion poll and especially if it's one backed by a group with a specific axe to grind.
But this is revealing to me, since I didn't know they ignored some data or that the kinds of deportations and their numbers were different.