Why do authorities care about dumpster diving?

I can’t understand it. Yesterday was move out day at CU Boulder so naturally it was the biggest dumpster diving day of the year. I personally only do it rarely on occasions such as this, but i’ll tell you, i found some GOOD stuff. a new trash can, a desk lamp, one of those big wrestling belts, sequined glasses, a boot for someone with a broken foot, a suitcase, a whole box of band aids! hello! people are throwing this shit out!

now, the question is, why would a cop give somebody a ticket for this? i know they can and have, and just today in the Boulder paper it talked about how they were going to start watching for it and giving out more tickets. QUESTION: WHY? there is a warning on most dumpsters not to go in or you’re doing it at your own risk. and the last time i heard of someone getting hurt dumpster diving was never. why, if someone wants to traipse around in trash to get something for free, be less wasteful, and save money, would anybody else give a shit? especially the homeless. if they can find clothes or something they really need in a dumpster, why should cops care?

i really am looking for the serious answer, dont they have much, much, much more important things to do? like anything else? i just dont get it.