As far as I see it, with it's requirement for real names Google has essentially taken a first real step to being evil, while Twitter on the other side seems to be a much more open platform that is used by a lot of people that don't want their real names to be known for one reason or another.
How do you come up with that conclusion? That's like a child saying their parents are evil for making them go to bed at a reasonable hour. If you look at all the other social networks, a lot of griefing and spam comes out of people using fake accounts and psuedonyms. Its not impossible to do either of those on google+, but its certainly going to make people less likely to do it. I think griefing and spam is evil. I think that google is perfectly justified to prohibit the use of pseudonyms. Especially since its still in the beta phase, and they are still trying to work with a limited user base.
Consider the postage stamp: its usefulness consists in the ability to stick to one thing till it gets there. -- Josh Billings