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I'm sure I'm not the first to think of this and I think I even fell for it on someone else's home node long ago.
And this was fixed a while ago, because if you can send a message (to a user or the chatterbox) just by a simple GET request this is open to CSRF. Actually before this was fixed you were able to put an image tag in your home node and its source was a link to sending a message, so it would have been automatically called when you visited the homenode.
So it's good that this doesn't work anymore (although it's still not fully CSRF protected).

Why the prefilled form requires to edit the fields I don't know; it might also be a kind of protection but makes the msg link kind of useless.
Update: The prefilled form requires to edit the text field only (not the recipient, like I first thought when looking at the HTML source), and this is probably meant as a protection, so that people really look at the prefilled text before sending it.

In reply to Re: Problem Linking Within Perl Monks by tinita
in thread Problem Linking Within Perl Monks by koolgirl

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
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