Nope. The dump was caused in part by end of week day traders cashing in. Happens every Friday on a lot of coins.
Also, the original large 30k Buy wall disappeared and the Whale created a fake larger dump, combining with the day traders one, to try and get people to dump into his newer 40k Buy wall.
Won't work though, so prices will start climbing back up now to the 58k+ area. Then when/if the short-term Roadmap is announced this weekend, Lisk will see some great highs. Either way I expect Lisk will be a lot higher this weekend.
Also regarding blocking spammers, I believe that someone created a way to not only block, but also hide any comments they make from showing in "quoted" replies that people post. Pretty sure it was from someone in the Blackcoin thread from about 2yrs ago who created it. Maybe someone remembers the link to it?