사용자가 HTML로 차단된 단어를 우회할 수 있습니다

[Falco]

Same principle as

Bypassing character minimum on posts via HTML

Yes, this is well known, there are many topics on this. Have a search. It’s WONTFIX because there are as many methods to bypass as there are grains of sand on a beach. We only care about the common and easy ones.