The first recorded crime happened when Eve was tempted by the Serpent to eat fruit from the tree of knowledge. The Serpent is still there, but you don't have to listen to him.
That particular serpent may have been motivated by sheer mischief; most of the worms, phishes and other lowlife who troll the Internet whispering in the ears of man and woman, young and old, have interests that are strictly temporal, in particular your cash and how to part you from it. Often that starts with the password to your e-mail account, or all your passwords if you store them on your computer.
If your ISP is British Telecom, you are probably already aware that the way you log in is shortly to change. If you don't, the screengrab below tells you what you will be doing, and what YOU MUST NOT DO under any circumstances, in particular DO NOT click the link, or any link in this e-mail because plausible though it looks, it is not from British Telecom. For one thing, British Telecom will address you by your name, which is probably not BT Users.
If you receive this e-mail and clock the reply button, which is safe to do, you will see this:
BT Services Security Center email@example.com
who will clearly have some explaining to do if and when the authorities catch up with him. Chances are they won't bother. What will happen to you if you ignore this advice? Well, it may cost you £131.79. Or a great deal more.
This is not the first time you've had this warning, and if you haven't done so already, make yourself a sign-in seal.
Official looking though this e-mail may appear, it is NOT from British Telecom.
Below is yet another recent spam message, one that is not aimed specifically at BT users; it was obviously conceived by someone with a single digit IQ. Please demonstrate to this individual that yours is not even lower by moving it to your spam folder.