It is definitely annoying if you don't have a ton of speed and are trying to do the most reasonable approach of getting the fastest to the finish line. However, in most 5k courses, you are just not going to be able to optimize your results if you adopt that strategy. You have got to get off the line fast in order to be in position to contend. You usually will not be able to pass for significant stretches of the course, especially the first mile, and you will also be 'paced' by slower people as you try to reach the front during the race. Get out hard the first 6-10 seconds with your ATP burst and then settle in at a somewhat slower but still quick pace and train to do this. One option I heard recently was to do mile repeats with a fast first lap (close to mile pace) and then slow immediately at the beginning of the second lap and continue at that slower pace (say, 5k pace).