The default place when you make a thread (unless you are in general when you click the "New Discussion" button) is the New Members Welcome Area. I've had it happen before too (before the New Members Welcome Area existed it was never a problem).
Garrick's words "It's a beautiful day in the Neighborhood" is from the opening theme song "It's a Beautiful Day in the Neighborhood" from the Mr. Rogers Neighborhood show
Not a song but Xzar' words "I ate his liver with some fava beans and a nice Chianti" are from Hannibal Lecter in "Silence of the Lambs" movie and Hannibal liked classical music;)
Here's one (out of several) of the threads from back in the day containing similar information: http://forum.baldursgate.com/discussion/5769/compilation-of-quotations-references. Perhaps it'd be a good idea to consolidate and sticky a post with each and every pop culture reference, easter egg and idiosyncrasy that was ever up for debate, as these threads keep popping up once their predecessors go toward the archives.
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Unfortunately, any link I found for it appears to be broken when I post it here between SPOILER brackets.
Not a song but Xzar' words "I ate his liver with some fava beans and a nice Chianti" are from Hannibal Lecter in "Silence of the Lambs" movie and Hannibal liked classical music;)
Also, Khalid's "Ch-ch-ch-chia!" is from Chia pet commercial while his "Th-th-th-th-that's all, folks!" is from Porky Pig in the Looney Toons Cartoons