Should students follow teachers?

“I’m a public high school teacher who currently uses Instagram and Twitter. I post pictures of my kids and life and the occasional political retweet. Throughout the years, I've been friended on Instagram by current students, which I have rejected. But I have accepted to be followed by former students if they find me later. Other than a few likes of my posts, I haven't had any interactions with them outside of that and I haven't returned following any of them. Are there any potential downsides to letting former high school students follow me if they find me?”

There's definitely nuance here – mostly because some teachers only use social media in a personal context. And others (especially professors, I've noticed) also or only use social media in a professional context.