Note posted by the management @ 7420 N Ashland Avenue on 12/10/13 (Tuesday). This is the building that has been plagued by five minute friends, crack pipe kit dropped at its corner, and has been rumoured to be in receivership.
Most move outs aren't posted so its quite possible that this one had something to do with recent shenanigans. A general notice of this sort written for the casual passerby is highly unusual. Looks like this source of drugs is gone. Probably to be replaced with another nearby. Or the slack will be taken up by another aspiring entrepreneur.