I strongly agree with this issue. I play WvW most the time and have both daily and weekly set to WvW. There are 3 objectives I always ignore when it comes to daily and weekly - defend, jumping puzzle and EotM.
If removing the defense objective is not a solution for them, they could just fix it by giving defense credit for ressing dead NPCs inside the structure and repairing walls/gates within the defense timer. No need to give them a participation credit or bronze/silver/gold credit. Just make them count for daily and weekly. The same sense with dolyak escort, just get near them to pop their bubble and still get escort daily or weekly.