I suppose the answer could apply to any instance, but I'm mostly referring to this one.
Mind you, I don't have two accounts, but I'm considering it: one for memes, the other for serious discussion.
But I'm unsure if that's considered bad form by most people, so I thought I'd ask.
Thanks!
EDIT: Also, come to think of it, even if it were okay, would it even be possible to have to be logged into two separate accounts on the same instance at the same time with the same browser profile? :/
Another option, if you're on Firefox, is to get the addon multi-account containers. That allows you to log in with multiple accounts since it keeps cookies separate