When I rollback your edits, read the page history, there are comments explaining the rollback. The fact that franchise is called after Tony Hawk doesn't make him the main character. Is he main character in THUG or THUG2?
Look, Tony Hawk is the one who got involved with the series, so he is the main character in the series. The reason why he is the main character is because of the Video Game Franchise's name "Tony Hawk's".
Is Kojima the main character of Metal Gear since he got involved with the series? Is Sid Meier the main character of Civilization series since it has his name in the titles? The answer is no. In any story mode Tony is a background character with a few dialogues. Basically, in video game the main character is a character you play with like Gordon Freeman in Half-Life. You can't even play as Tony Hawk from the beginning in most story modes. In THPS there is no main character at all. You can pick any skater and complete the game. In THUG series this guy can be called main character: http://tonyhawkgames.wikia.com/wiki/Custom_Skater_%28Underground_series%29
Please, do not remove info from various pages until you can provide better replacement for it. For example the release dates from Tony Hawk's Underground page. If you believe the dates are not correct, you can do an extensive research on the topic and provide us the links with correct release dates.