Another Scam... Sigh

Am I the only one who's having this issue with liquids from the store lately? This is the second time I've purchased a bottle of laundry detergent from Target, only to start using it and realize it's been watered down. Sounds like a scam to me- people are buying detergent, pouring a portion of it into a container at home, refilling it with water and returning it. It's then placed back on the shelf by store employees who don't realize what's happened. So not happy. Both times this has happened at TARGET stores, although I did notice a bottle of conditioner at Publix that was missing about a fifth of the contents. (And of course it could happen at any store.) Even worse- the laundry detergent I just bought had a loose cap and a good portion of it leaked onto my laminate floor and ruined a sizable section of it. I realized it was watered down when I went to use what was left. Not happy.