Well yes its good to have a good avatar that spreads a good message of global warming , green earth Hope people will get together and think about solutions on preserving our earth. Also i can't see your text in your avatar..
Now that kind of avatar is too scary but you got one point..Once you have them people will not forget you
You've successfully attracted my attention on the banners, but these are not suitable for the children...
Everyone of those is a horrible choice for an avatar, especially if you try to do anything professional here. First it makes you look like some emo kid who thinks death and scary faces are cool, or some idiot that thinks it is a good idea to flip off every person you encounter. Second, the font is hard to read. Third, and again this is if you are trying to e professional, it shows the viewer nothing good about you, only a bit of darkness and ugliness.