Since you ask about, specifically, "important ramifications," I'll provide you with a suggestion as to a single easily quantifiable ramification of something as seemingly trivial as piles of sticks:
"
Maybe the lawn next door that you once envied has turned brown or the flower beds have been overtaken by weeds. Or perhaps the grass hasn't been cut in weeks and the house is surrounded by what looks like a wheat field.
........
Research from the Federal Reserve Bank of Cleveland shows that neighboring property values sag by up to 3.9% when a nearby house is in the foreclosure process but still occupied. When the offending house is vacant and the taxes aren't being paid, the value drop can be twice that much."
http://articles.latimes.com/2012/oct/21/business/la-fi-lew-20121021
Quantifiable cash - you leaving your place to get uglier costs your neighbours money in property value.
Less quantifiable but also a very real risk is the potential fire hazard caused by what is essentially a pile of the stuff you used to start a fire sitting there, getting nice and dry, simply because you're too lazy to deal with your mess. Unwanted animals can nest in it. This is all beside the obvious point of everyone in the neighbourhood spending time and energy to make their properties pleasant for everyone to look at, except for one prick sitting there stamping his feet leaving piles of dogshit laying on their unmowed lawn or some such.
And this is all ignoring that the "asshole" comment is more about the metaphorical attitude and the slippery slope attached to it. Your property, your business - right? Fuck the people who tell you what to do on it? That's all good and fine - until it's something really sketchy. Then you'll be crying bloody murder - "well, they can't do that for (insert reason that's important to you here)." Part of the premise of neighbourly civility is that your notion of what's important is relative to you - and your neighbour won't share it. That means that to be a good neighbour you have to do some things that aren't particularly important to you for the good relations and well being of someone whose interests differ from yours. At the point where you say "fuck that guy - and everyone else" you set a precedent of a whole bunch of shitty neighbours popping up and saying "fuck you" as the neighbourhood goes down the toilet.
Your post even reveals that you recognize that there are ramifications, for your neighbour, for letting your property go to shit to varying degrees. Because
you don't think they're important, you don't care about acting upon them. That's why you're an asshole.