Bashguards and bunnyhops are the way to go. Regarding higher bottom brackets, the newer freeride bikes that are coming with higher bottom brackets are due to the greater suspension travel. After compressing the suspension the bottom bracket ends up lower than a hardtail, so if you hit a log and the suspension compresses your big ring would not only still hit, it would be more likely to hit. High bottom brackets lead to poor handling in general (cornering, climbing, and descending) and are only used to keep from constantly pedaling into the ground on a suspension bike, don't expect (or want) manufacturers to start raising bottom bracket heights beyond what is necessary.