Using the Collectible board to go from newbie to Hero in a few months is something a determined individual can do. The howardsentell and Kazkaz27 accounts have brought a lot of attention to themselves recently, if they had avoid the drama by posting in (or creating) threads that were in other boards they would probably have remained under the radar.
Don't worry, he's not ignoring you (check your trust wall.)

Welcome to club of people he's harassing, abusing, and bullying with unsubstantiated red trust. I have the distinct privilege of having earned 4 red-tags from him and his alt. That may be a record, I haven't bothered to check.
He left a very detailed negative tag for me

He's too much of a coward to post in this thread, and he's trying to avoid digging himself deeper into the abyss he's created for himself. Also, he's under the delusion that he can dig himself out using his alt.
That seems to be the case. Why on earth would he sit idle and allow someone else to post on his behalf to defend his position. When I created this thread, all I did was to express an opinion and asked others that have engaged with the account to post their experiences of communicating with him. The fact Kazkaz27 came out on a full scale offensive against many accounts while simultaneously defending howardsentell, is very strange.
He left me a negative tag because I created this thread. He obviously read it therefore he gave a merit to the Kazkaz27 yet he has not posted anything here apart from an image.