Redditor Junkyardmessiah has a proposal for dealing with neighbors with very large stereo systems:
Simple suggestion here, I had the same issue with a neighbor that no matter how nicely or how well I explained the situation he refused to stop playing death metal at 4 am. Frequent calls to the police only ratcheted up the harassment.
In deference to XKCD the real way to cause problems with her system is pretty simple. You need a Cheap CB radio, A linear amp, and a bottom loaded CB antenna (easier to build a ground plane for it ) . See if you can get a good guess where she has her shit set up and get your antenna close as you can to it, You should be able to talk to her THROUGH her stereo system. The amplifier sections are not shielded in these plastic ready made toys and the resulting AM signal will impact it. In my case I ran a continuous 6khz tone from a signal generator which was more than enough to blow it up good. ENJOY!
I came pretty close to desperate enough to try this last year, when the squatters in the derelict building next door to us got evicted and replaced by much, much less considerate squatters, including one young fellow who’d decide he was Fatboy Slim at around 3AM most mornings and start blaring dubstep directly into the shared wall that backed on our bedroom (and our infant daughter’s bedroom, for good measure). That’s when I learned that Hackney’s “noise abatement” process is: a) call noise complaint line, leave message; b) wait 1-2h for callback; c) request a visit; d) wait 1-2 hours for the noise abatement team to show up; e) if the noise is still ongoing, they can then issue a warning to the noisy person. After multiple warnings, they can seize the offending equipment. Needless to say, we never managed to get them to the house in time to catch Mr Slim-Lite in the act, let alone issue one of their stern warnings.
(via Lifehacker)