Have you ever done any of the following:
1. See that someone is at 75% hit points and start yelling at them because they are not in your line of sight while they calmly use a heal scroll to top off as you continue to yell at them.
2. Similar to one but you run across the map to where the other person is and after they use the heal scroll you hit them with 4 consecutive spells totalling about 2500 in hp.
3. Hit someone for 5k with a crit heal spell. Then exclaim how awesome you are and that your healing is godliness and has nothing to do with their gear or enhancements. You then continue to hit the same person any time they take dmg with the same heal spell rather than use a cheaper spell that will fill them up just the same.
4. The quest just finished and you're still at the start of the quest yelling for people to gather up so you can buff them.
5. Demand that people follow your instructions the entire quest and that if they don't they will be carried around in your backpack and not get heals. All this while the rest of the group is completing the quest once again.
6. Get bent out of shape because a single almosxt dead mob is beating on you and the tanks are not doing their job keeping them off you so you can do your job healing.
So if you answered yes to any of the above, I suggest you stop worrying about others so much and thinking that their gaming experience revolves around your awesomeness. Pick up a weapon, cast offensive spells, zerg to the end and kill everything with a blade barrier before the rest of the group can. Try to get on the kill count list.
To shorten all this, Stop Being a Nannybot.