I always flush the toilet multiple times when I walk into a bathroom and someone is talking on a phone in a stall no matter what.
Are you doing that just to annoy them?
Yeah, pretty much. I don't know why you're in the bathroom talking on the phone in the first place.
I get that it's kind of weird to be talking on the phone in the bathroom but you should respect that they are having a conversation and try not to be noisy. They aren't really bothering you. Imagine if it was an emergency and you're making it hard for them to hear whats being said.
Oh, then I'm sorry to hear that :/
It's okay, I hope you are more aware of your surroundings now. If something isn't bothering you, you should just leave it or them alone. Instead, how about just quietly doing your business and get out, to let them have their privacy?