The fact that the Marines actually think Buggy is a giant threat now is so beautiful to me.
Because, deep down, he is. Shanks and Buggy have the same thing Luffy and Roger do; Buggy, without even meaning to, just attracts people to him, and finds success through uniting different forces.
Big Mom, a YONKOU, kept fucking up her relationships with the Giants, while Buggy had a healthy business relationship with the New Giant Pirates.
In terms of ammassing powerful people, Buggy is a top tier character, and it honestly does make him dangerous in the most hilarious way possible.