As a local, I can tell you this isn't the greatest area in our county. Squatters have conquered several abandonments in this city. With that being said, you'll either run into the gang-banging type, druggies, or migrant workers just trying to get by. The latter are typically friendly, but the others can prove quite volatile.
Squatters aren't always a threat, but they're usually very protective. It's therefore important to exude confidence while completely respecting their location (treat it like it's their home). Before entering the building, announce who you are and state your purpose for being there. Ask if you can come in.
Honestly though, you probably made the right decision. I understand the draw of exploring a location others might overlook, but sometimes you're forced to weigh the risk v. the reward.
Plus some local explorers, myself included, have found meth lab remains out that way. And an active meth lab is the last thing you want to run into.
Be careful. You guys look young, which should never stop you from exploring, but you need to be cautious of folk who might target you out there. Especially in these types of neighborhoods. Always bring at least one friend, and consider telling someone on the outside where you're headed beforehand.
You could always send me to scout it out