PJs - agreed on Ghostery. I use a "soft security" approach. I allow a bunch of cookies, but I also clear out my browser's stored files numerous times per day (usually any time I walk away from my computer).
OK, here's a sample Woodworking Forum search. It's a Google-based search, BUT it limits searches to 38 hand-picked woodworking forums:
Custom Woodworking Forum Search Engine
We can integrate this feature into the site more cleanly, with our custom look/feel but this prototype shows the important part: the search results. We can also do the same thing for different forum groupings: machining, boat building, hot rods, etc.