Kudos to you Helena, I'm glad you enjoyed your leash.

For me personally, while I would like to do that, I don't have the courage to do that in a public place.
There can be a fine line when you openly express yourself in public, but I don't think that wearing a collar and leash is going overboard.
It might create a few stares and sniggers, but no one is doing anything truly offensive.
Taking a submissive out naked, tying them up and having sex with them in public would be crossing a line.
The couple in Ontario, who were roleplaying crossed a line. He tied and gagged his submissive in a convertible; subsequently the police were called.

There are also a lot of people who choose to wear goth style clothing, and that elicits a lot of stares, but it doesn't harm anyone in the long run.
Women are allowed to go topless in Ontario, and there were a couple of women that did so here where I live. I would worry more about my childeren seeing that than a woman on a leash.