Thread:DEmersonJMFM/@comment-6069990-20140522160429/@comment-5558012-20140522231647

They aren't perfect (mainly because files are named differently and I'm not great at creating the proper expressions for all undesired names), but they do work to stop at the very least some files with random file names (the only way to know if they work is to try to add an image of the undesirable name via a non-admin account, which I don't have). Some of the expressions on this wiki are a little stricter than others due to poor naming practices, but you can loosen them a little by increasing the numbers if you wish.

If you do use them I would recommend that you add a message to MediaWiki:Titleblacklist-forbidden-upload along the lines of "If the file name contains random characters, give the file a descriptive name and try again." since the common editor wouldn't know the meaning of the error (not done here though).