Twitter added a new feature to its settings this week, allowing users to check a box that would allow direct messages from any follower, regardless of whether or not you follow them in return. (Currently, direct messaging — private messages between two Twitter users — is allowed only if both parties follow each other.) Caitlin McGarry outlined the new setting and its implications on TechHive yesterday.
Basically, it boils down to this. For lots of folks it would be really helpful to be reachable via private message on Twitter — except for the spam that could result. Turning on that feature could be followed by an immediate scramble to turn it back off if your DM mailbox starts filling up with useless chaff. The good news is, it's as easy to turn it off as it is to turn it on.