I thought it was interesting listening to Mike Golic talk about this on Mike and Mike this morning, as someone who has been through rookie hazing both as a rookie and then as a veteran. I agree with him, too. If you're talking about making a rookie carry pads or buy donuts on the way to the facility on Saturday morning, or even if there's a big tab and you make the rookies split it, fine. Golic even said that in most cases, including his own personal experiences, if a rookie ever came to him and said he couldn't afford it, they backed off and didn't have him pay anything. Those things are, for the most part, harmless and part of the NFL for better or worse. Hell, when Hard Knocks followed the Dolphins last year, in training camp they showed the rookies having to put on a talent show for the veterans as part of the hazing. Nothing wrong with that.
But this crap is absolutely ridiculous. There's always the one jerk in a frat who takes pledge hazing way too seriously, and this is a horrible extension of that but in what is supposed to be a professional setting.
In short, Incognito is a piece of rancid and should rot in hell.