[Shitpost] "Do not throw toilet paper into the toilet!" Do I throw it in the waste bin?

As a foreigner traveling in Taipei, I might have eaten one too many you tiao that disagreed with my stomach. I had to run into a park restroom (of course it's a squatty toilet) to unleash a disgusting cacophony of what I suspect is the Taiwanese breakfast. When it comes time to wipe I notice a sign -- "do not throw toilet paper into the toilet". There's a wastebasket with a bunch of (blank looking) TP in it. I'm wiping and it's pretty damn gross, I can't imagine throwing my diarrhea stained TP into that so I just threw that also into the toilet. When I flushed, lo and behold the TP didn't get fully flushed :(. I guess, as an American, is it normal to throw your sh1t stained TP into the wastebasket instead of flushing it down with everything else?