Kalibah

This is true at a lot of universities. I think its important to note that he didn't get tased for not having his ID as is sometimes insinuated. Rather he got tazed for not complying with the officers demands.

I was always told to comply with a law enforcement officer at all times. If you feel what they are asking is unlawful- then you appeal later.

If they "removed" him by force, is there any doubt in your mind he would have gone after them for injuries? Buises, etc. I seem to recall Michael Jacksons shoulder injury as the result of being put in handcuffs. If they so much as bruised him they would be dammed for not using the tools they are given designed to force compliance.

To be honest though I am a little unsure of the timeline. Correct me if im wrong but it goes like this.

He shows up- asked to show ID- refused crying racism.
He used computers to finish a paper.
As he was about to leave campus security shows up.
He says he is leaving.
They ask him to stop. He goes limp to protest and refuses to come with them.

Is that about right?
If so then their stopping him was totally justified. If he broke a university rule- ie failed to show ID- then the fact that he was leaving is moot- he broke a rule. From what I understand library staff asked him to show an ID and he refused - at that time he could have left without an alteraction (still breaking the rules however).

Its like trespassing- it doesnt matter if you will leave when the cops show up - when they get there - they are going to investigate.