[Rene Kriest]

• Use this one for forced ignore of users via adminCP. This way an Admin can force a user to ignore another user. It works with 3.7/3.8.
• Another addon suggestion would be miserable users (have a look at the search function). This will simulate a slashdotted server to those who haven been miserabled and makes searching almost impossible depending on your addon settings.
• vb solution: advise your users to use their privacy features well. You can modify the way your profile and data is handled (visible only to friends/everyone/...) via userCP.

I use a mixture of the mentioned addons and features to keep hecklers and stalkers in places. Also I would suggest to ask why the user is stalking. Sometimes there are really good reasons to do so - sometimes!