Re: How many people are on your ignore list?
I've only put two people on ignore, and neither is a registered user any more, so at this point it's zero. It's hard to get on my ignore list here, because even the opposing viewpoints are interesting to read.
I checked another site I post at, and I have 44 people on ignore. That's still a pretty small percentage of posters, but it gets very polarizing, so there are times where the ignore function comes in handy.