To understand how dumb that is, consider that AOL(!) runs a popular messaging service on which thousands of people exchange secure messages using OTR-enabled clients, and AOL could not be "killed" the way Lavabit was: the DOJ can't coerce AOL into betraying OTR-protected users, because AOL simply doesn't have that ability.
The reason Lavabit did have that ability is that getting users to install software is inconvenient and drastically harms adoption. Lavabit took a shortcut, and their users shared the resulting pain.
If you review the list of countries preceding the US on the Forbes list posted upthread, you won't find too many that wouldn't have left Lavabit similarly exposed.