Twitter locked the two project-specific accounts I use regularly, but not the personal account I use to log into Tweetdeck. Supposedly for behavior violating the Twitter Rules(tm), but all I had to do was verify my phone number on each.
I only tried to log in b/c Tweetdeck wasn’t loading their columns. I suspect that it was Tweetdeck’s error causing the suspicious behavior to begin with.
Or Twitter just really wants a phone number on every account now.