I Spy Too Much on My Kids' Phones ...

So yeah, I've been sneaking into my kids' phones to see what they're up to lately. It's not like I don't trust them... it's just that sometimes... well, I worry about their safety and stuff. Like, how do you know when something is too far? What if I'm overreacting? But then again, what if I'm not? They're only in high school... and the world feels so much scarier now than it did for us back then. My husband thinks I’m being paranoid... but honestly, I just want to keep them safe. Am I a terrible parent for doing this? Or is there something else I should be doing instead of secretly reading their texts and social media stuff? Your thoughts on this would mean the world to me...