One of the things that bothers me the most is when people come to me and bitch about how "so and so takes advantage of them" or how "this person walks all over them".
Here's a hint, and it'll save all the energy you spend bellyaching, so it'll be good for the environment too:
Stop letting people take advantage of you. Stop letting people walk all over you.
And lest you think that this is just me doing the exact same thing I'm criticizing others for, i.e., coming here and whining instead of telling them to stuff it... I usually tell them just what I've said here. Quit yer bitchin. If you're not man enough to stop people from eating your lunch, do you think you're man enough to force me to listen to you cry and pee your diapers? For free?