Blocky is shown to be malicious and reckless. He constantly targets and kills various people whenever given the chance, like popping Bubble, kicking Woody, throwing Ice Cube off a cliff, and extinguishing Firey repeatedly. These attacks are very often downplayed as "pranks" on his end, they usually are at the expense of other people's well-being, which clearly makes this bullying. Blocky hardly shows any remorse for his actions and is rarely social to people outside of his friend group. You Can Use Those, No Credit Needed, But I'll Appreciate if You Did.
Credits: JnJ For BFDI
