It's not hard to see why airlines hate scraping tools:
1. You are using a website other than their own to search (eg you might give up trying to find a points seat on qantas.com & decide to purchase a cash seat instead).
2. You can compare prices (eg you can see the same Qantas flight for cheaper using an alternative currency, suggesting Qantas points are less valuable than you initially thought).
3. It increases load on their servers (ie the scraper is repeatedly and constantly searching the entire calendar; that's well beyond the capability of any regular person).
4. It increases the ease of fraud (eg points brokers can more easily trawl for availability, scoop it up and onsell it).
