Description of problem: This is a human-interface issue. Currently, people using bugzilla who are not familiar with it, or not familiar enough with it to realize that there is a "proper" way to attach arbitrary files as file attachments, have a tendency to just cut and paste their huge X server log files, config files, /var/log/messages or other text files directly into the comment textbox, making the bug reports very very hard to follow, having to scroll over this massive file attachment in order to read the next comment, then scroll back over it to review the previous comments again. When they attach multiple files in this manner, it is very frustrating. The reason they do this, is because they simply are not aware that bugzilla has a file attachment feature to begin with. Recently, I told a reporter to please use the "Create a file attachment" feature when attaching files, and they responded with "I can't find any such feature in bugzilla". A year ago or so, we had a "Create a file attachment" link directly under the comment box, in prominent red writing, and I almost never got bug reports that had pasted file attachments. Now, I am getting 1-3 bug reports per day which have pasted attachments and are unreadable. When the attachment is a config file or a unified diff, or something else to which I need to download locally and apply (a diff) or test (a config file), quite often I have to hand edit the files due to bugzilla wordwrapping having corrupted the file. This wastes a lot of my time and is very infuriating to the point where I just update the report with instructions on how to use bugzilla properly, and put it back into NEEDINFO_REPORTER until they attach the files properly. Otherwise I just want to close the bug report WONTFIX. When you have hundreds of bug reports, and get unreadable ones that end up consuming a lot more of your time than they really need to, you tend to deprioritize those ones, and work on the ones that are easier to read/handle. IMHO, this is a weakness in bugzilla itself, and should be fixed to be more user/developer friendly, as that would boost everyone's productivity and reduce stress and frustration a lot.
Maybe it would also be good to have a line limit in comments, at least as a "soft" limit. If a user tries to add a comment longer than the allowed limit, Bugzilla could give them a "warning" page that asks if they really don't want to attach the long data (there could be a "no, just do it" button so that it doesn't really take out the possibility of actual long comments).
Link added to bug edit page below comment box for adding a comment. Note text added to bug enter page to use create attachment instead of large amounts of text.