Please participate in board activities (you'll be kicked if you don't)

We're planning a small event on the board. Some people join just by seeing 'event' in the board title and don't participate in activities, so I'll be kicking them immediately. Only a few people are posting and being active, so I'd appreciate it if everyone could participate more actively. Some people join the board and say hello. No one welcomes them except me. If you post, I'd be grateful if you could leave a comment and give a like (tip).