Want to see how drug use can destroy a neighborhood?Mosey on down to the corner of Sycamore and Yosemite avenues. Look on the northeast corner. There stands a two-story monument to the destructive power of drugs.Back in 2005 Laurie Share — a Marin County resident with a solid background in low-income housing development in San Francisco — bought the building and renovated the structure.It had the moniker “Meth Manor” before Share stepped up.