  Due to the limitations imposed by the COVID-19 pandemic, many users have
shifted their shopping patterns from offline to online. Livestream shopping has
become popular as one of the online shopping media. However, many streamers'
malicious selling behaviors have been reported. In this research, we sought to
explore streamers' malicious selling strategies and understand how viewers
perceive these strategies. First, we recorded 40 livestream shopping sessions
from two popular livestream platforms in China -- Taobao and TikTok (or
"Douyin" in Chinese). We identified 16 malicious selling strategies and found
that platform designs enhanced these malicious selling strategies. Second,
through an interview study with 13 viewers, we provide a rich description of
viewers' awareness of malicious selling strategies and the challenges they
encountered while trying to overcome malicious selling. We conclude by
discussing the policy and design implications of countering malicious selling.
