LOL that's pretty funny man.
One thing I've found is that you don't find many people who are dissatisfied with their scrubber. I have come across a few people that tried them but didn't like cleaning every week and weren't seeing results so just gave up without figuring out that it was built completely wrong.
The biggest problems I have seen is when someone puts one on a tank that is completely overridden with algae from long-term negligence and/or poor husbandry in general.