Are Assassination factions or factions that destroy unprotected property in the wild accepted? Of course, not at random. I'm thinking of making a faction that can be hired to do these things. Is that allowed on the server, or would I be banned if I tried either of those things?

Okay, after reviewing the rules, destruction is not allowed even if unprotected. That is fine, then the faction I want to create won't destroy things. However, there was nothing about assassination, except for the pvp rules. Is assassination allowed?

yes

but i doubt everyone will have pvp enabled which makes assassination factions kinda useless

Assassination wouldn't be the sole focus. Plus, who said I'd go and attack them? Maybe I'd lay a trap for them? <object class="emojione" data="https://resources.enjin.com/1489581540/themes/core/images/emojione/svg/1f61b.svg?0" type="image/svg+xml" standby=":p">:p</object> Anyways, main focus would be a merchant.