Hi,
As is "unwanted attention", even if verbal,
and "sustained disruption,
interruption", which would be applicable if people are continually
interrupting your talk on purpose (similar to the "background
conversation" note, though not the same thing).
Right - I got the sense from the original description that people were
talking among themselves just because they thought what the speaker was
saying was unimportant, not in an attempt to disrupt the speaker. (Though
background chatter is always disruptive, and a pet peeve of mine, but
that's another story.) I still contend that, for what it's worth, many of
the reasons Risker offered for why a young woman might be afraid to attend
Wikimedia events would still be valid even after a code of conduct was
adopted and enforced. (Though the most egregious ones would be handled.)
-Yaron