You should be celebrating UA took no other action than to warn you. This is particularly true since you were making a habit of throwaway ticketing. Regardless whether you agree with their policy, you are now on their radar and should discontinue this practice.
A bit off topic, but the same holds true with complaints to UA. There is recent discussion about how often someone can/should complain (particularly the petty stuff) and the $ vouchers $ people are getting as a result. At some point, the chickens will come home to roost.
Bottom line in both cases: If you are going to do it, don't be the outlier on the data reports UA miners dig up.