Some ex classmates are stalking my social medias after 4 years of no contact?

today i’ve been sent 4 follow requests from these people (i’ve never seen them since 2019-2020), and i still don’t know how they managed to find out about my social media, specially tiktok and twitter (the accounts are not linked to my phone number or anything). they sent me friend requests on instagram and facebook, and followed my tiktok, all at once on the same day. these people were some of my bullies (kind of) they didn’t bully me but always never wanted to talk to me or be near me bc i was “the weird one” etc. what i don’t understand is why would they do all this? all of a sudden follow me on social media? i’ve blocked them, and they make fake accounts to stalk my tiktok or send me friend requests.

is this normal?

Some ex classmates are stalking my social medias after 4 years of no contact?
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