>

London Underground stations reportedly do similar.
Is this like how the 7-11s in my city blare opera music to keep tweakers from hanging around outside? >

My ass would enjoy this, get high and listen to opera played for meee.... Ooo i'd get myself a new spot to put my tent. >

As someone who lives in Wrexham, I can confirm this is true. Though... it doesn't work. The same rowdy crowd of drunk bellends still floods in around midnight though 3-4 AM especially on weekends. 
(This is the same maccas thats had its front door smashed in numerous times.)