I too have seen them, both influencing PP and BGS. They would run passenger missions, and Preps of a 5c. They can take off, jump to another system, dock. If ye scan em, they log, if ye hail em, they log, if ye get in the way, they run over ye as if they didn't see ye, (which of course they don't) They originally flew in open. Fdev seemed to ban those accounts when reported. They came back, reported again, as well as the new set, and seemed to get banned again. They are back. It may not be rampant yet, but it is possible, and the OP knows it, and well, it's cheating and is annoying when ye have to deal with it. The evidence ye seek has CMDR names, and so can't be posted without namin and shamin. They no longer play in open, so they can no longer be identified, by us, so no longer reported, so no longer banned unless FDev has found a way to spot them, but after months of dealin with them, it is obvious they are there, they have some specific objectives. It isn't fer credits, it's to harrass those they they have an issue with.
Yeah that was ramblin, but all true. I think OP was just tired of the effort, and since we can't track em by settin outside a station anymore, and followin em, we now have to rely on FDev to catch em, which they haven't done yet with this last batch.