You have zero control over what the shared account contains. The previous user might have sent abusive messages, participated in banned groups, or shared illegal content. By logging in, even temporarily, you could inadvertently become associated with that activity. Facebook’s systems log every action. An innocent browse could land you in serious trouble.
If you're considering using Bugmenot or a similar service for accessing Facebook or other accounts, keep the following in mind:
Facebook does not just flag suspicious accounts. It also flags suspicious devices and IP addresses. If you attempt to log into a shared, spam-ridden BugMeNot account from your home computer, Facebook will record that device ID. Later, when you try to log into your legitimate Facebook account from the same device, Facebook may temporarily block you or require enhanced verification. You could effectively poison your own device.
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