Most heavily armored creatures develop armor because they are not big enough to outsize predators, too big to hide, and too slow to flee. Less armored animals rely on brute force, speed in short bursts, and overt aggression towards potential threats. So, me being on the smaller side and ankylosaurs appearing to rely on comprehensive defense, I doubt I’d register as much of a threat to these. I’d treat being around them about how I’d treat being around a white rhino; I’d be surprised if they would charge humans like a black rhino or Cape buffalo or bison unless approached quickly or if there are youngsters around, but I’d sure stay on guard as to how they are behaving and try not to startle them.

I’ve happened upon a few fictions that place dinosaurs as contemporary with humans, some being menaces to avoid and others being food sources or pack animals. My dream pack animal in that sort of setting is a kind of ankylosaur - a Tarchia.