大錯特錯!!!
Threadcrap 其實是一個字 (我寫成兩個字... Ooops~~~). 當下的用法是, 當名詞是可數名詞, 用法和 bodybuild 相同. 如當動詞用, 則用法和 houseclean 相同
現在進行式當然是動詞的部分 (crap) 加 ing 啦~~~
Threadcrap 的 thread 就是討論串的意思, crap 是動詞, 所以threadcrap 加 ing 是 threadcrapping.

This a thread, so a threadcrap is crap in a thread, or an irrevalent reply to the thread that disrupts the purpose of discussion. Threadcrapping is the act of doing so. The verb here is crap, not thread. Therefore, I was right in saying "threadcrapping" or "thread-crapping."