Yep! Someone breaking your crew rules? Anyone with admin rights can kick an unruly player from your crew.
If you're an admin, head to your crew Member List.
Tap on the offender's name, and you'll see a popup with the option to remove from crew. Just hit that button and poof! They're gone! Keep in mind though that players cannot be kicked during events.
You can always re-add anyone you remove from your crew.
If someone's breaking Highrise Community Guidelines, also feel free to report that player for review by a mod. And, of course, block anyone by going to their profile, tapping the ellipses in the upper right corner, and then tap "Block" to cut off all communication.
Just remember, during an event, you cannot kick crew members, even if you're an crew admin or the crew founder.. You'll need to wait until the event ends if you want to kick them out, so make sure you have people that you trust to be on their absolutely bestest ever behavior!