Hi Aaron,
Apart from the comments of your behavior by our fellow members, here lies my part.
Offer decline by a candidate is very common nowadays. I have faced situation wherein the candidate called up on his joining date to say that he is not joining. Another worst situation, one candidate, when found that he didn't come in on time on his joining date, and a HR person called him to take his status. The candidate's reply was "Oops I forgot to mention that I would not be able to join" :) All these would definitely form a bad cloud for the HR & TA team. Many candidates after receiving their first offer, will surely look out to fish. That is a common behavior of any human.
However that does not mean that the HR should carry personal vengeance/grudge on any candidate. Again any HR cannot spoil your career or black list you from getting a job, for the reason specified by you. Even if that HR spreads out the information in his network, it would not help him to prevent you getting a job. Any HR is bounded to their organizational goals and taking somebody's word, if can, will not help him/her. If you have a valid reason for rejecting the offer, including you accepting a better offer, then go ahead without any second thought.
Also please ensure that you do not repeat the process of offer rejection again. Always remember that this is a small world. One of my friend (HR) happened to experience an offer rejection situation and later in his new company the candidate who rejected the offer in his earlier company was finalized. This guy (my friend) did not show himself before the candidate and an offer was rolled out. When the joining date was closing by, my friend pulled back the offer, which was extended to the candidate. I completely understand that this is unfair. However at that point the affected party is the candidate. Think over and wish you good luck!
Apart from the comments of your behavior by our fellow members, here lies my part.
Offer decline by a candidate is very common nowadays. I have faced situation wherein the candidate called up on his joining date to say that he is not joining. Another worst situation, one candidate, when found that he didn't come in on time on his joining date, and a HR person called him to take his status. The candidate's reply was "Oops I forgot to mention that I would not be able to join" :) All these would definitely form a bad cloud for the HR & TA team. Many candidates after receiving their first offer, will surely look out to fish. That is a common behavior of any human.
However that does not mean that the HR should carry personal vengeance/grudge on any candidate. Again any HR cannot spoil your career or black list you from getting a job, for the reason specified by you. Even if that HR spreads out the information in his network, it would not help him to prevent you getting a job. Any HR is bounded to their organizational goals and taking somebody's word, if can, will not help him/her. If you have a valid reason for rejecting the offer, including you accepting a better offer, then go ahead without any second thought.
Also please ensure that you do not repeat the process of offer rejection again. Always remember that this is a small world. One of my friend (HR) happened to experience an offer rejection situation and later in his new company the candidate who rejected the offer in his earlier company was finalized. This guy (my friend) did not show himself before the candidate and an offer was rolled out. When the joining date was closing by, my friend pulled back the offer, which was extended to the candidate. I completely understand that this is unfair. However at that point the affected party is the candidate. Think over and wish you good luck!