I agree, though if the poo is fairly solid then scopping out at least gets most of it out of the pool. If it was runny...gee this is gross. Anyway, the general rule at commercial pools is that pee is one thing and not so bad (it's mostly just urea which is similar to ammonia anyway; not generally unhealthy bacteria) while poo is just cause for shutting it down.

The good news is that even with the higher shock chlorine levels, you may still be able to swim in it tomorrow with elevated chlorine levels. The same CYA that has you have to use so much chlorine to shock it is the same CYA that makes the effective disinfecting chlorine levels low enough to swim in (20 ppm FC with 50 CYA is about 0.4 ppm HOCl or equivalent to 0.8 ppm FC if there were no CYA).

If you find your CC > 0 (certainly if it's > 0.5) tomorrow morning, then you may be taking a risk with swimming in the pool so check your FC and TC tomorrow to be sure. As waterbear says, it's much better to be safe than sorry.

Richard