Considering she could've spent 7 to 8 hours online on the wired instead of taking a bath, Lain could really be a smelly bear which then contaminated her entire house which lead to her adopted parents leaving her except her sister who lost sanity from her smell. And how was Arisu immune to lain's hacker scent?? Does she too not take a bath?? And does lain used those extra time to search for new racial words at the wired??