How do I tactfully tell guests not to poop in my toilet?

ETA:

Sorry, OP, I’m not open-minded to cleaning poop and whatever else from my bathroom floor either, but if you have a party/have kids over/have a pet/share a house/whatever, it will happen. Just one of those lesser points of grownuphood no-one told you about :). You’ll laugh about it when you’re older. Really…

Or, what Chimera said…

Leave a sign

“If you want to be a fine fellow
Use this can only for yellow
If you know it will be brown
Use the other, two doors down”

Whatever kind of sign you use, make it easily visible to them BEFORE they enter the bathroom. Do not expect certain people to leave a bathroom to go to another one. Make sure they see it well before they are even near the terlett.

And convince the 'rent to open her potty, too. Offer to clean it and her room afterward. But have another fully functional elimination portal available.

I think you should just have the help spackle each guest’s asshole shut on arrival.

Kind of like a back door prize?

My impression from reading this thread is that the OP hasn’t reached “grownuphood.” She’s living with her parents who have decreed that her personal bathroom will be open to the guests, along with the hall toilet, but that they don’t want people traipsing through the master suite to get to the master bath. I don’t think there’s any persuading to be done here – they don’t want guests in their bedroom.

What is unclear to me is whether the OP’s parents are aware of the clogging problem and if not, why not? If so, have they taken this adequately into account? Or do they not agree with the OP regarding the likelihood of the toilet clogging? Or maybe they do understand but still don’t believe that a single toilet will be adequate for the number of guests?

This seems to me to be a particularly adolescent problem. During the transition from childhood to adulthood, people tend to get hypersensitive about their privacy. I know at that age I didn’t want my parents or (gawdhelpus!) their friends getting anywhwere near my bedroom – it felt like a serious personal violation that as an adult is easier to handle. I’m guessing that to get to the OP’s bathroom, the guests will have to go through her bedroom. It’s not a comfortable situation for a teen. And I also know that parents often can be pretty insensitive to this kind of thing. It’s strange because they’re keen to protect their own privacy, but slightly more callous with the teen’s privacy, even though the kid is experiencing a heightened degree of sensitivity compared to them.

So this is my question – has she talked to her parents about this?

There’s a lot of data missing.

In other words, it’s possible that the clogging isn’t the real concern here.

So now they’re dancing jigs in the potty room?

Ideally, this should play on a video screen mounted above the toilet whenever someone enters the room. Be sure to make air quotes when you say “take a shit”.

“no poop for you!”

ha ha, you could probably get all you need from ratemypooDOTcom in the way of printable pictures.

I dunno; if I hear clogging coming from my bathroom, I’m probably going to be REAL concerned.

And then you open the door and see this.

Aghhhhhhhh!

Fiuh-powuh!

You know, guests are in general quite embarassed about these things already. I think just a plunger in plain sight is all you need. If a guest clogs the toilet, or finds it clogged, they’ll get it unclogged ebfore they leave there. Just make sure the fan is really noisy so they aren’t embarassed by the sounds of it.

nobody light a match.