There is a loose analogy between Domain parking and land speculation (though it's not perfect -- you can make more domains, but you can't make more land).
Another approach you can try instead of a formal complaint department is to apply a universal "use it or lose it" tax to the asset at risk of speculation, as economist Ramin Shokrizade famously did in EVE Online to oust speculators and solve problems with recessions:
What's hilarious is that in doing so, he unwittingly rederived Henry George's Land Value Tax from first principles.
Applying a properly sized tax that disincentives holding assets for speculation can actually reduce the price overall, because speculators stop jacking the price up knowing they can HODL forever.
Another approach you can try instead of a formal complaint department is to apply a universal "use it or lose it" tax to the asset at risk of speculation, as economist Ramin Shokrizade famously did in EVE Online to oust speculators and solve problems with recessions:
https://www.gamasutra.com/blogs/RaminShokrizade/20130405/189...
What's hilarious is that in doing so, he unwittingly rederived Henry George's Land Value Tax from first principles.
Applying a properly sized tax that disincentives holding assets for speculation can actually reduce the price overall, because speculators stop jacking the price up knowing they can HODL forever.