You may want to check these threads. Regardless of the first post and the title, there are valid contributions inside, by many Viki old-timers:
https://discussions.viki.com/t/filter-blacklist-comments-commenters-while-watching/
https://discussions.viki.com/t/im-sorry-but-timed-comments-need-to-go
https://discussions.viki.com/t/is-there-anyway-to-have-lewd-comments-removed/
As for me, I am a die-hard fan of Timed Comments. But whenever I am a moderator I do a very thorough clean-up so that the irritating or offensive or repetitive ones can go, letting the interesting and funny ones shine.