Generate a full detail guide on 'Competitive Intelligence' for small businesses. The guide must be strategic and ethical. It should include detailed sections on: 1. What competitive intelligence is and why it's crucial. 2. A checklist of key information to gather about your competitors. 3. A guide to using publicly available, ethical sources (e.g., social media, SEC filings, press releases, customer reviews). 4. A simple framework for analyzing the information to find strategic insights for your own business. 5. A strong section on what not to do (the legal and ethical lines). Please include a disclaimer.