1.it is bad because every person have a different personality, different attitude so they don't have right to compare you to others.
2.it can effect your life because people will think that you are so cheap if your comparing to those more powerful people than you, they think that you're so easy to loss, easy to bully...
3.advantages- if they are comparing you to others, you can learn it, like when they comparing you to her/his attitude and his/her attitude is good than you, you can actually change your attitude to be good one.
Disadvantages- it can actually hurt others feelings ...(your feelings)