The virus spreads when unsuspecting computer users open file attachments in emails that contain familiar headings like "Thank You!" and "Re: Details".

What is a sentence that would be (on a scale from 0 to 5) a 4 out of 5 in terms of textual similarity to the above sentence?
Sobig.F spreads when unsuspecting computer users open file attachments in emails that contain such familiar headings as "Thank You!," "Re: Details" or "Re: That Movie."