Would you stop a speaker in mid-sentence if you disagree with a statement he or she has made?

Treat the situation like a debate. Let the speaker have his full say and then make your comments or questions.

No, I'm polite and use my manners.

Depends on context...

... is the person hustling you on the streets, etc...

... but in normal conversation it's damned rude.

No never ever ..even if i am damn sure that speaker is completely wrong ..why ? Because the first rule of winning a debate is to listen the full argument .those who interrupt or counter argue without listening often end up embarrased and lose ..

No! Let them finish

only for 2 reasons. 1 if the statement was incorrect scientifically or when they say something i said or mean like they can know what i mean.

No because I realize there are differences of opinions and I'm okay with that. I don't start frothing at the mouth demanding to be heard like someone that's just pooped their diaper....😱

I'd only interrupt someone if something they said was blatantly wrong. Otherwise I let people say what they want and prove to me how much/little they know.

Speaker as in a formal speech? No that's just crude.
If it's some schmoe that I'm listing to casually, I'd just shrug it off.

Being respectful you should let them finish their point. Interrupting is a dick move!

No unless I felt the speech borderlined
on assault.

I try not to

Nah.

Nope..

Nah, let the asshole ramble.

Yup.. ‘don’t bullshit me’....

Don't argue with an idiot; people watching may not be able to tell the difference 🤣

No id be respectable and wait till they are finished