If you felt a pure, distilled hatred for a dumpster rental company, you could rent their biggest dumpster, fill it with magnets, and return it. Chances are that you would not technically be violating your rental agreement, in that you have caused no damage to the dumpster, and it would probably take them weeks to remove all the magnets.
I wouldn’t recommend this strategy for people who didn’t have
- intense hatred
- lots of money
- lots of time