I haven't experienced this issue w/operators.
I wouldn't be able to say how much % of the workforce is like this. And it must be said, in all fairness, that there's a lot of friendly operators out there who have been receptive to me and friends of mine when we've taken photos of their vehicle. But, going back to 2012 and continuing right through to the present day, I've had a not insignificant amount of hostile interactions, ranging from ops who thought I was trying to get them in trouble while they do their job, through to them calling the police on me.
Both variants seem utterly baffling to me. I doubt that head on confrontations with people you think are doing something wrong is part of the TTC training policy, because that seems like a great way for people to put themselves in danger. (And I don't think it's a photography thing alone - I think there was something on here a few months ago about ops confronting people who walk in through the bus platforms without paying? Also doesn't seem smart).
And confronting someone you think is trying to dig up dirt on you, though an understandable natural reaction, is surely self defeating if you're going into the interaction with a hostile tone. It's playing right into their hands. If I was a management plant trying to crucify said op, or a member of the public trying to do the same, they're giving me loads of ammo to work with.
It is probably my biggest customer service issue with the TTC. I don't really mind, personally if an op ignores me when I greet them (of course, a friendly greeting returned is always superior), but the half-flinch every time I press my shutter... well, luckily the sidewalks outside of the stations are usually better spots for photos, anyway. But sometimes circumstances dictate otherwise, and you don't know who it is you're dealing with. The first hostile confrontation I had with a bus driver was when I was only 14. Guy at Wilson told me I wasn't allowed to take photos and threatened to call the police on me and my mother, who was accompanying me. He walked away and we tried to board a bus to go away, but he came out of the station building and started pounding on the doors of the bus right after they had closed. I don't know what happened for him to think that was an acceptable reaction.
Now, all that being said, I'm not sure how much I like the idea of the op name being used instead of a "hey you". It's a subjective thing, but in my years of working retail I always found it to be unsettling when a customer tried to be all buddy buddy with me like they weren't a stranger.