Maybe it was a bit of a cattle-call experience, but IBM is sorting through thousands of similar grads and needs some way to screen them for technical positions when many will have no professional history.
If being asked to take some tests, then flown out for a stay in a nice hotel and a big mixer (with some great networking opportunities, btw), then offered a six-figure salary at your first job out of school requires a "name and shame," then the OP sounds a bit entitled.