When ever I (Rarely) play a Play4free game I feel sad when ever I see someone who has all of this awesome weapons or something like that. They spend $30 on some awesome cash thing when they could have gotten a decent game for the same price.
A few months ago I was playing this (Evil) game called Free Realms. Half of the time I was walking in circles while the other half I was talking to some boring robot. It wasn't long till my brain stopped working.
Another example is Combat Arms. An FPS where your gun can go through walls. For one, they didn't spend enough time expanding the battlefield places so in a few minutes you would have gone through the whole place 7 times. Plus there are so many hacks there that as soon as you are out in the open someone has sniped you with a pistol.
These are only a few examples of the evilness of play4free games. But obviously, they are evil.