Instead of throwing away, do off-siting but person loses storage privileges for say 3 months 1st offense, 6 months 2nd offense, permanant on 3rd, make it real pain* for imposing work on others, not 30 days or so. There is a lot of labor required for off-siting. There are a lot of members waiting for storage spaces. Much of it is never picked up and and when I was helping with offsiting a lot of it just looked like crap they didn’t bother to throw out when they were done: Meh, they’ll throw out, why bother.
DMS incurs real costs in off-siting: cost of storage units, time and effort by volunteers that could be better used elsewhere. Volunteer time is very valuable. People can make arrangements to have things picked up (I’ve done that for people) OR have someone show up at the Storage Meeting (seen this done when @ESmith was the Logistics Meister asking for an extension, almost always granted, never saw it denied for first extension, at 3 or more need a good reason) I’ve proxied for people. Is that really excessive, oppressive, or too much effort to to expect from adults to enjoy Free Storage privileges?
* I know, I’m cruel and heartless for having less than low expectations for adults to be responsible.