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
It's landlocked. For more stuff see its wikipedia article.
peugeot Renault look them up on wikipedia
click edit
I bet 1,000,000 dollars over 100 people use wikipedia everyday 4 the latest 411 on superstars and stuff.
Not sure how many people do but just go on a search engine and type in the fact you saw from Wikipedia and see if any other website has the same stuff you saw on Wikipedia.
In that case it'd be a fitting place for someone posting stuff like that.