Someone at Facebook hates concurrent programming and is aiming to do for threads what Stack Overflow did for google searches for info about stack overflows.
I assume you remember when Facebook launched their 'Hack' programming language. This should be less of an issue. unless you're looking for the BBC series about nuclear war.
"Threads" is already extremely overloaded as a term (the computer science concept, the linguistic concept, the apocalyptic BBC show, the clothes....) Search engines cope.
As you say, Hack (and Go...) were both more problematic names.