Also network keys, mac addresses, dns(and thus what city you live in), active internet sessions, etc. Yes, alot of it can be wiped, but I bet alot of people aren't. I am just saying people need to use caution. Not saying not to do it..just use caution. If you there can be no harm...I don't think you really know all the info contained inside of them what that info can be used for if obtained by the wrong people.