why should they be excluded because they happened to buy the game later?
I've been saying the same thing for awhile now.
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There is no reason for this discrimination, and you can't really understand how much of a problem it is unless you go through it yourself. My ID is in the 3000s, and I am treated unfairly just because of this. IDs say nothing about who you are, and thus they shouldn't be used to judge someone. I don't want to be excluded from servers or participating in builds just because someone who doesn't know me automatically judges me and thinks they are above me. There are plenty of people who are immature / bad builders with low IDs, and there are plenty of people who are mature and have incredible building skills, but have high IDs.
I think everyone should be respected and given a chance, and if they prove to be annoying or detrimental to the server then they can be excluded. If we treat people that have high IDs with disrepect and make them feel worthless, then they will do the same to people with even higher IDs, and thus this will just continue.