Doesn't seem like it's the majority of users or people on the instance. From nbats on disc:

I just need more proof they're actually super malicious because most of the stuff linked was downvoted on exploding. in other words yeah shitheads exist there, but they don't seem to be the majority really

EDIT: after some further discussion we've decided to defederate. we'll be making a post sometime soon with a defederation policy.