dangers of sharing netscape mail folder between linux and windows

I'm sharing my Netscape7 Local Folder (mail directory) between both windows and linux versions. It all is just working fine! Why could it be so dangerous? a. -- Adagilson Batista Bispo da Silva Bibliotecário FIOCRUZ-Centro de Pesquisa Aggeu Magalhães Fone 81 3302-6524