New test suggestion for spam getting past the filters

I had a some of spam comments that went right through the spam filter and caused some weird side effects with Drupal's edit functions. The spam filter should have caught the comment; by the content of the subject line, by the content of the body and by the massive number of links -- but it didn't.

I thought they had found some special character or command to bury in the text so I went looking to see if I could find it and block it.

Observations:

Weirdness in Drupal - The comment appeared in the article but when you went to edit the comment -- the text box was blank -- but other entries were filled out (name, email, etc.)

So I went to the database and edited the entry. The body content was there, so I copied and pasted it into Kate, my editor.

Kate didn't display it properly and the vertical scroll bar didn't work. I studied it and noticed that it was a single line, 128,528 characters long, (no newlines in it) and there was an <h1> at the beginning and </h1> at the end of the line. The body was composed solely of hundreds of these:

<a href="different links">"different copy"</a> |

links with the vertical bar used as a spacer between them.

I thought there possibly could still be embedded "somethings" in the text so I broke it into lines of less than 512 characters, so that I could scroll down the text and see if anything weird popped out.

Nothing was there so I have to assume it was simply the length of the line (128,528 columns) causing all the problems.

A test that rejected a single line that was more than xxx characters long would fix this -- if I am correct that it is the length of the line that is the problem.