Your friend should try using Google. Google even has an advanced search page for refining queries.

For others, there is an 'Add to ignore list' option, but a flaw of this website - and others using the same code - is that it takes too many steps to get to it. It really should be just below 'View forum posts'.

If more people used this option, the happier this would be. It would also be cool if users' profile pages showed how many ignore lists they were on - as a self-check.