[blind-eddie]

I have searched around quite a bit with no luck.
I can help you set up a link in your MEMBERINFO template for members to send you a pm when they come across profiles as you stated. Or I can help you add Easy Forms(3.8) or Easy Forms(4.0) and create your own report form with a link named Report profile added to the MEMBERINFO template for members to click, fill out & submit to either a pm to you on, an existing thread or create a new thread in a forum you pick.

But, none of this will stop anyone from doing what you stated, it only reports it.
If you set your permissions correctly, you should not have this problem.

You can also make a request in the Requests For Paid Services or in the Modification Requests/Questions (Unpaid) forums.

I do understand your frustrations, but It is up to you to stop it, not vbulletins. You can stop all that you stated with ease with default vbulletin & a couple addons.
I have 4 vbulletin sites & get little to no spam what so ever & never do I get what you stated you are getting.....Good luck

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This is what you are after?