How to spot a Twitter follow bot
It's not that hard frankly! I've attached a graph showing the last three months of followers and following for the @web_cardiff account, and you can see the pattern clearly: The green line is the bot. It follows a bunch, waits a few days and unfollows those who didn't follow back. Repeat. (My graph isn't 100% accurate, but you can see the numbers for yourself: followers / 'friends'.)
What do you think? Is this bad practice? In this case, the information isn't bad - a few links go to the owner's site, but most point to genuinely useful resources. Friendly spam or useful resource worth promoting in this way?
