Was the warrant excessively broad? I'd say!
What exactly is the point of the police seizing someones mice and display screens in a case like this other than to ensure that Mr Chen now has an even bigger bill to pay if he wants to get back to work any time soon?
I think a bigger question is whether the warrant would have been issued/executed against his home if he didn't work from home. Somehow I doubt the DA would have had the balls to raid Gawker's offices over this.
They should probably (just to be on the safe side) confiscate all personal property, even for the most limited of warrants, juuust in case it might have some flash in it somewhere. I'm trying to think of a reason to grab all of the money in their bank accounts too, in case there's some hidden code in the account numbers and quantities as well...