I don't have a list you can copy/paste into Protector, but here are some sites giving information related to user-agent/bots/spiders:
- http://www.user-agents.org
- http://www.botsvsbrowsers.com
- http://www.siteware.ch/webresources/useragents/db.html
- http://www.useragentstring.com
I've never adjusted the default setting for these user-agents in Protector. Sometimes Majestic12bot gets blocked by Protector buts that's because Majestic12bot is an agressive bot. A good counter like PHP-Stats will detect the user-agents for you.