My thoughts, on this PARTICULAR situation this is honestly it depends how much you care?
If you're wandering around, gnashing your teeth, because you're percieving quarter hogging left right and centre, and you're furious that it happens so much and wondering why NOTHING IS DONE! about it!
Then report it. Tell us. Let us look into it. You may not get the outcome you want, but you have our words we will follow it up and see if someone really is hogging that quarter and we'll take action, though in my experience the action is more likely going to result in that person playing more, than the quarter going up for sale.
If you're wandering around and ging 'huh. Such-and-Such owns that quarter still? Funny I never see them around. Oh well.' - then get on with your day, with the matter scarce bothering you? Don't feel like you have to report it. That's fine too. In this case it is also on us to check these things periodically, and there's others who'll care more. And frankly (warning, this is going to be controvertial) if someone is owning a small vault in the Grove, with less than the maximum rp and -no one cares- is that really the end of the world?
Some rulebreaks really should be reported any time they happen. But quarter hogging issues are harder to track because often there IS NO rulebreak happening, it's just someone logging in at odd times. So I don't feel like DEMANDING people report EVERY TIME they think there's ANY form of hogging going on is that condusive to anyone.
That said, I feel that (and this is true of many rule breaks, not just quarter hogging) if something IS bothering you, then just complaining on dischord/forums isn't going to get you anywhere. Report it. You'd be suprised how often I see complains here of 'such and such and such and such is happening ALL THE TIME! And the DMS do NOTHING!' Then I look at our reports and we've heard literally nothing (or very little) about such complaints. If it's a big enough deal to complain about it on the forums, it should be a big enough deal that we've gotten reports about it.
This too shall pass.
(I now have a DM Discord (I hope) It's DM GrumpyCat#7185 but please keep in mind I'm very busy IRL so I can't promise how quick I'll get back to you.)