I have three theories about blocklandian:
-He secretly loves bubbagum. He is just embarrassed that he loves her so he try's to cover it up by insulting her and anyone who likes her. 7 year olds flirt this way all the time
-Bubbagum is actually his sister and he is jelous that she is more popular then him on a forum he was on first, so he is trying to get back at her by trying to get everyone to stop her
-All of the above