Tips on tips?

To all those submitting anonymous tips, please, please, someone submit a tip that I can a) give at least a HINT to who’s involved and b) am not liable to get nailed to the wall for publishing? 

So far I’ve chosen two rather enlightening stories to publish but I’ve not been able to specifically say or even hint who or what company it is. 

Has anyone got some slightly tame stuff — you know, not just pornography, drugs and sex tips?  😉