The motivation behind using a bypass pack usually stems from the high stakes of competitive multiplayer:
Some specialized clients (like Media Client ) use a "block update" method. They quickly "punch" blocks in a radius to force the server to send the real block data, momentarily revealing ores. anti xray bypass texture pack
are so effective, trying to bypass them often leaves a trail of suspicious mining patterns (like "mining straight to diamonds") that lead to a permanent ban. The motivation behind using a bypass pack usually