It isn't up to NiceIce to make sure their customers pay taxes. NiceIce is following all of CA's rules, the customers aren't.----------------
The internet is bringing some interesting problems and questions to light. While NiceIce is not located in California, the argument could be made that if you sell and ship to a person in California you are doing business there and should follow their rules. The only thing may be for the Feds to step in and regulate internet transactions as "interstate commerce".
----------------