yes by being a member of the site and by clicking on edit on every page
yes you can erase stuff on wikipedia
You can't. You can edit it with crazy stuff but before that stuff goes up on a Wikipedia article the Admins check it.
NO!
No, anyone can change or add things to Wikipedia
Start with Wikipedia - I will make the link below.
what is wikipedia
According to Wikipedia, it's mostly rags or cotton.
click edit
It's landlocked. For more stuff see its wikipedia article.
peugeot Renault look them up on wikipedia
I bet 1,000,000 dollars over 100 people use wikipedia everyday 4 the latest 411 on superstars and stuff.
In that case it'd be a fitting place for someone posting stuff like that.