Katrina, instead of leaving yourself, why don't you simply block them?

They won't able to contact you anymore!

Name them publicly so everyone knows who they are. Anonymity gives them the freedom to continue what they are doing.

Karina, at the top right part of your screen you'll see your photo.  Click that & choose Settings.  In the Settings screen choose the Privacy tab and give Contact Permissions only to "People I'm following".  That way no one can send you messages unless you are already following them, in which case you have some common ground & shouldn't mind the messages.  If someone you're following becomes to persistent you can simply unfollow them & they won't be able to send messages. 

Yes, you go in the profile of people's you don't like and, just below their pic, you click on "block". There is also a "Report concern" in case! It's quite easy here kicking jer** off from your life!

I agree with Luigi,

you have an option to block anyone,

so don't bother, and enjoy your time here,

Good Luck :)