Well, anecdotally, I've been in a house full of drugs when the cops showed up, and those drugs were gone before the cops stepped foot in the house. Yes, I had a not-so-optimal childhood.

Were they serving a warrant, or just asking questions and eventually invited in?

We had a small party (only about eight people or so) and a couple of us got loud in the backyard. The neighbors called the cops and, where I lived, they were coming in, warrant or no warrant. We knew that, so down the toilet it went.

Interesting. Where was this, and what kind of interaction preceded their entry (if you recall)?

Rockton IL, population (at the time) ~3,000. They knocked, we knew who it was, we ran/dumped. I didn't stick around to see them at the door.

Could you share how this was accomplished?

We chucked most down the toilet, some people ate some.