I do not use toilet seat covers, however...

...every time I close the bathroom stall door, I pull out a toilet seat cover, crinkle it around a little, and drop it in the toilet, just in case someone else is in there, listening, and judging whether or not I use a toilet seat cover.

I know it's crazy, but bathroom judgment is the worst kind of judgment.  I do it all the time, and expect that others do it.

And do not try to tell me that toilet seat covers do anything.  I read the research.  They don't.

The end.