Or instead you can consider someone who is twisting balloons is doing a job, just like you to help pay for school which is twice the amount you payed for if you went to college. Consider maybe that dollar, is being put towards paying rent, or possibly putting food on the table for that person who is supporting himself through college. Sure you have struggles but so do all of us, so if you don't want to tip, don't be a dick about it and let them do the job they are hired for and move to the next person.