NetChoice is working with companies trying to get an injunction against the Maine law going into effect, DelBianco said.

Maine State Senator Elizabeth Schneider, a Penobscot County Democrat and a sponsor of the Maine law, didn't immediately return an e-mail seeking comment. A spokeswoman for Maine Attorney General Janet Mills didn't have an immediate comment on the law's inclusion on the NetChoice iAWFUL (the Internet Advocates' Watchlist for Ugly Laws) list.

NetChoice released its first in June, but the Maine law was introduced and passed since then. "State regulators and legislatures don't take a long enough summer vacation," DelBianco said.

Also among the items new to this second version of the list:

-- An ordinance in New York City that would tax service fees charged by online travel-booking sites and travel agents, in addition to taxing hotel rooms. The additional tax would force online travel-booking sites to collect taxes for the first time, DelBianco said. Other jurisdictions are considering similar taxes. "This would drag these online travel services into the business of filing tax returns in every city where they book a room," he said.