Don't take a shortcut across the lawn. That is selfish (in the most objective definition of the word). People / companies spent time and money making the surrounding area beautiful. It is hard enough to preserve our environment without people going "off trail" and destroying what was created.
There are a series of principles known as Leave No Trace. The concept is that we should attempt to leave as little trace of our existence on Earth as possible in order to preserve the greater environment for both the natural (non-human) world and future humans. This method of conservation involves a seven point program of principles to follow.
Although Leave No Trace is often applied in the Back Country (i.e. backpacking) there is no reason why it cannot be followed in the Front Country (i.e. likely where you are reading this!).
The concept of conservation does not have to be put into "liberal" or "conservative". It can be thought of merely as are you consuming something that other people / animals / plants could or should use. Conservation can be a simple as "are you being selfish and consuming the grass by walking on it". If you are having no impact, then why not use the grass. However, if your impact is the destruction of the grass and encouraging other people to destroy the grass, then don't do it.
- Outdoor Ethic (BSA) http://www.scouting.org/scoutsource/OutdoorProgram/OutdoorEthics.aspx
- Leave No Trace https://lnt.org/