I'm on the SW side of Elgin. The back of our subdivision borders South Elgin. I'm over by the Portillo's/Menards/Meijer.
We don't have any issues, other than some of the neighborhood kids, being neighborhood kids.
However, come warmer weather, the park down the street is used for drug deals (despite a Kane County sheriff living two houses away), around 11pm. I'm out riding my bike then (it's nice to ride at night with minimal traffic), and he (the Sheriff), has given me explicit instructions to call 911 and have Elgin PD respond, which I have several times, sit back and watch the fun.
Then sometime around late summer last year, a bunch of teens got busted dealing drugs out of their parents house further down Annandale.
Over the years living here, we've had a couple "questionable" dudes walk past the house, and our big black lab (who is always outside with me), stands firm and starts growling at them... It's funny watching them jog across the street to avoid any confrontation with him.