Either way, I don't recall talking about the subject "often" and don't know what constitutes as often compared to other people/parents.
However, from as early as my children are able to understand I've talked to them about the importance of reporting any activity that might be untoward.
I would tell my children "No body is allowed to touch your privates. If anyone does you need to tell me, especially if they say it's a secret"
"If they tell you not to tell you definitely MUST tell" Reminding my children that only people with something bad to hide try to hide things from others.
This worked so well that when I tapped my child on the bottom they told me that's one of the off limits body parts.
If they were around strangers such as a school camp, sleep over, play date etc. I would ask them how it went and find out in a round about (sly) way if anything bad happened (this could be anything from bullying to worse) - and also talk about the awesome, fun things that happened. Kept the dialog open and let them know I'm here for them no matter what.
(I've known people who had bad things happen to them as children, who didn't tell their parents because they were too affraid, or who told their parents only to not be believed - perhaps this is why I'm more aware of it?)
As they got older we had more in-depth conversations, not more as in more often or regular, just more age appropriate details and examples. For example, talking to my children about not taking photos of themselves in underwear or partly undressed and sharing them with others online because they're out there forever. I love the looks they give me like, who on earth would do that? A great empowering way for them to view things.
When they're in chat groups I ask them about the other members, their age, do they know them in real life, where do they know them from. It's rare for them to make connections with people they don't know in real life. I ask about the things they talk about, casual conversation that leads to them opening up, and mostly they'll talk about trolls or people who don't play fair or nice, or funny memes that were shared.
Recently I talked about online grooming, asking if their school had talked about this. Turns out schools aren't talking about how to protect yourself from online predators (only online bullies). Then my children asked what grooming meant and so we talked more about that and what it looks like.
This is what I mean. Open conversations where we can talk about anything and everything with each other. Building these relationships with my children, looking out for them, making sure they're ok, has kept them safe (as safe as can be).
That *person can judge me all they like. I've kept my children safe, protected them. I've taught them what to look out for, what to be aware of, how to spot untoward behavior. I've been very careful about who they've hung around with, where they go, who they see and spend time with.
It's something all parents should be doing. If you don't teach your children what to be wary of, and if you don't protect your children, who will?
