BadBoy highlights:

• Gold, phishing and hack spam auto reporting and blocking
  
• Multi-to-single line consolidation

Explain the Multi-to-single line consolidation feature please? Sure!

Quote from Random Trade Dude:

LFG Instance
LFG Instance
LFG Instance

will become:

Quote from Random Trade Dude:

LFG Instance

Can I configure it?

Type /badboy ingame

What sets this aside from other spam blockers?

BadBoy was created with a focus on assisting Blizzard and the user with spam removal, whilst being a light and efficient addon.

Plugins

Whispers by level blocker BadBoy_Levels.
Anti anal/etc spam BadBoy_CCleaner.

• Please post missed spam on the forums or PM me here.