Not saying this applies to your situation, but here in San Antonio there's a park with a long history of having some mellow/small-ish jumps. Just about every summer, bigger kids re-shape the lips on the main line to make 'em steeper (and they feel nice that way) and in the process dig out the gaps between the ramps. Afterwards, some groms come along and don't like the scarier gaps so they stack boards and crap in between and end up rolling the lips, which wears 'em down. It's a classic arms race.
Neither group has any right to complain because NEITHER built the jumps in the first place. The point is this: if you want a jump line your way, then build it from scratch - don't take it upon yourself to alter what's not yours.
After it rained this holiday weekend, I spent about 8 hours digging at those jumps. In addition to making some badly needed improvements to the step-up line, I made a full tabletop grom line next to the main line. Hopefully, the two groups can co-exist better now. But, alas it is all on public property and we don't have express permission to build there. (We do, in fact, have implied consent from the parks department but that's an entirely different story.)