1. Someone who doesn't understand open source claims that open source means source available
2. Someone who does understand open source points to the OSI definition and points out that availability of source is nowhere near enough
3. Bickering about legal matters as if trademark law is the best way to handle terminology
4. Accusations that it's essentially tyranny for the OSI and FSF to try to establish standard definitions for open source and free software, or for the rest of us to insist upon proper use of these terms
Examples:
• https://news.ycombinator.com/item?id=25367131
• https://news.ycombinator.com/item?id=25834067
• https://news.ycombinator.com/item?id=26079067
• https://news.ycombinator.com/item?id=27267367
• https://news.ycombinator.com/item?id=25364878