<human>: So my husband took my 2-yr-old out back to play today and noticed a blob of refried beans with a shoe print in it on the deck right by my sliding glass door, where someone would stand if they were trying to open the door. Our house is split-level, so you have to go out the back door and down stairs to get to the ground-level deck. On this level, he found another blob of beans, tomato, ground beef and crispy taco shell on the step. This blob was on the side leading from our neighbor's house, which seems to host no less than 6 surly-looking teens at a time, every day. There is no fence dividing the yards. I guess the neighbors are ok with the son having scads of friends over constantly, but they're usually all on their back porch smoking cigarettes in big, sullen groups. I am obviously not sure they're the culprits, but they have a history of leaving fast food trash in our back yard and in my experience, large groups of teenage boys are rarely able to stay completely out of trouble when together. To me, taco drippings seems like stoned/drunk teen activity. I assume they were checking to see if our back door was unlocked, but like I said, I can't be sure it was them.  Also, at 2am my kid started screaming like he was terrified and wouldn't go back to sleep for over an hour. He NEVER does that, so I'm sure he either had a really bad dream or heard noise outside that scared him. Now that I've seen the taco-drippins I'm leaning toward the latter. If it was them, I don't want these kids to have a reason to exact revenge if I call the police or anything, either. I want to keep my baby safe!

So my question is, do I call the police? Install security equipment? The house is a rental if that makes a difference.  Reddit, what do I do?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Back yard intruder dripped delicious taco bell all over my deck and possibly tried to open my back door. Suspicious of gaggle of teen boys next door but not sure. What do?