An attacking tom is very bad. Bruises given by poultry is very bad. Eat him promptly. A full grown tom turkey is no rooster... they are very powerful and could cause serious injury. I have raised hundreds of turkeys and never had one do that to me so in my experience it is not at all normal. Human aggression in any farm animal should be culled out immediately, whether it's a rooster, pig, turkey, or goat. The reason most farm animals are non aggressive to humans is due to this policy over many generations. Tom turkeys usually strut and hiss and attack each other but not humans. If you are going to kill and eat him make sure to wear heavy gloves and face protection when you grab him... they are very strong and the rear claw can do some serious damage, so grab the legs very tightly and hold on. You can rig a killing cone out of an orange safety cone. If you don't know how to do this do some research or get someone to help who does. A very sharp knife is important... ceramic is the best I think. Dry plucking is fine for one bird although it will take a while the skin quality will be better. Also since he is older slow braising rather than roasting is the way to go.