Signs about ticks...Sure! Maybe at the base of each route rather than the approach trails.

And while they're at it, maybe they should install signs warning of venomous snakes. Wasps. Uneven ground. Falling rocks. Loose dogs. Buck moth caterpillars. Loose soil. Lightning. Cold weather. Darkness. Chiggers. Hunters. Giardia. Microfractures. Meteorites. Obamacare. Dick Cheney. Nuclear waste.