Twitter Direct Messages (DM) went down Tuesday evening, is still currently unstable & seems to have affected users across the site.
Did a Twitter employee perhaps suspend the service?
When attempting to send messages, users were prompted with an “INTERNAL SERVER ERROR,” making it unusable.
Are Twitter’s servers possibly on fire?
Some have pointed out that this being the day before November 22nd, when the new Twitter Rules are supposed to be enforced, may indicate that this is communication between users being monitored more closely.
Some, as mentioned, think Twitter may have started monitoring communication between users more closely.