ID discrimination has been around for a long time.
It peaked during v9 - v10 when a significant leap was made in ID numbering, after the system hit 5 digits. Despite the initial popularity with 10k IDs which lead some to purchase them for the occasion (over-hyped by much of the community) the widespread understanding of the ID milestone re-ignited the ID discrimination problem.
The logic behind it was that a user who has a high ID must not have played the game for very long and will act un-intelligently and incompetently. The theory as flawed as, regardless of the users experience with the game, it does not put a cap on their creativity, ability or speed in picking the game up, or their personality and general intelligence. However because of an influx in players (perhaps due to increased IDs, or perhaps just a coincidence because more people were playing the ID numbering sky-rocketed) newer players, who were less-desirable in their "forum etiquette" if you will, were associated with stupidity. One could argue that because the age of the new players during the increased population, there was some truth to the intelligence of newer players being less intelligent than expected; but to be fair, it should be done on a case by case basis because its just not reliable enough.
Discrimination became so over-the-top a later update of Blockland hid ID's by default, but they could be enabled in the options dialogue.
There is an increasing dip in the attitude towards peoples ID's which is just as well. However, people who don't properly understand what the original meaning was continue to miss-use the theory. Its become a generic insult in-game now, but ironically it tends to back-fire on the speaker and reveal that they are indeed the handicaps; it takes a real moron to use that insult in the first place.
