1 when there is 1 other person in the lift tap them on the shoulder and deny that you never done it

2 draw a box with chalk on the floor of the lift and say this is my personal space dont step in it

3 throw a pen on the floor and when someone goes to pick it up shout thats mine you thief get of it

4 before somesteps into the lift face the far corner of the lift stare at it do not move and when the people are getting out scare them

5 put your desk in the lift and when someone steps into it say do you have an appointment.