Flava for thought

Having only been 7 years old when Public Enemy's landmark album It Takes a Nation of Millions to Hold Us Back was released, I just recently procured this record and listened to it for the first time. Some questions now remain:

1. What possessed '80s and early '90s hip-hop producers to think that that repetitive high-pitched squeal sound effect was cool? (See also: Cypress Hill's "Insane in the Brain.")

2. I understand the role of the hype man in hip-hop, but would Public Enemy's records really have been that much worse off without Flavor Flav? Is "Yeah, boyee!" really complementary to Chuck D's politically-charged lyrics?

3. I'm very clear on the fact that your DJ is named Terminator X. There is no need to repeat it any further. Also, I understand your group is called Public Enemy. This isn't really a question I guess. Just a puzzled statement.