At least the plug's only at the end of the pipe.

At my parents' house last year, the pipe connecting the manhole to the actual sewer below the street was clogged. Which isn't so bad, unless nobody really notices it and the sewage just keeps collecting in the manhole. After pumping a good 1.5m³ of delicious sewage out into the nearby bushes (smells great at ~25°C), I went down into the underworld (again, great smell). Found the pipe in question and managed to insert a hose with backwards-firing jets into it, connected to a high-pressure washer. The bloody blockage was 6m into the pipe. Probably grease and fat from the kitchen sink, most of all. Anyway, half an hour of bumping into it over and over again finally cracked it.

Not the most pleasant experience. No cockroaches though, so there's that.

I would feel so satisfied unplugging that pipe. Immense satisfaction just watching it.

Some good 'roach-eatin down that hole...