Well, I've not been registered long, so I don't know how much my opinion is worth, but here's my take.
Banning people because 10 members have asked you to is a big no-no. This isn't a popularity contest, it's a discussion forum. Besides, if you accept that there can be
one idiot who deserves banning among the members, what's to say there aren't ten?
It's always going to come down to a judgement call. When you get the PMs then you can look at the poster's record, and then it's your call. You have rules of conduct, apply them.
Here are the rough guidelines I apply over at another forum:
1) Personal insults in place of reasoned debate over a prolonged period = ban.
2) Vehement restating of an opinion as fact = warning followed by ban.
3) Disagreeing repeatedly with popular opinion = either nothing or a warning if it's tending towards 1 or 2 above (which it normally does).
It's all very well to say that everyone should ignore the trolls, but by their very nature they're trying to make people pay attention and respond. Better to get them out rather than spend all your time running around and clearing up the mess.
Deepak: "Banning is never been a solution in a Democratic Society.."
This isn't a democratic society. It's a dictatorship. And a benevolent (and immortal) dictator is a far better thing than a democratically elected government in my opinion.