By being in human form, you have accepted any an all chances of invasion in return for the ability to summon phantoms to help you through the game. Don't complain when you get invaded, it is your own fault. By using invasion items, people are seeking pvp and being linked with your 'request' rather you ment to or not. That being said, well known pvp areas such as the forest, burg, and kiln are almost never used for just pve. Just remember, if you gank or heal, all rules go out the window.