The forum rule is that account sales are allowed. When it comes to tags, that's up to everybody's personal preference.
Yeah but the tags will still be inline with the rules and regulations of the forum, if any tag is against the forum rules it’s abuse of DT power.
This is incorrect. The rules of the forum and DT are not related. Its not up to DT to enforce the rules of the forum -- that is done by the reporters, mods and admins. DT is not even supposed to tag accounts for failing to follow forum rules unless they feel its related to the account's trustworthiness.
Can you give a negative tag to someone who talks about US being the world? The answer is no even if you don’t agree with him or her, so giving tags is still done based on the forum rules and regulations.
You can give a negative tag to anybody for any reason and nobody can stop you. So your analogy doesn't make sense.
I think it’s better the forum amend that rule of account selling and make it illegal since it’s already illegal to almost everyone in the forum, so it will be known to everyone, if a newbie buys an account and then claims he was not aware it will lead to negative feedback on the account he bought based on the forum rule, can we actually blame him or her?
Yes, you can completely blame them. Blame them for trying to cheat by taking a shortcut, assuming credit for the previous owner's accomplishments (while also absolving themselves of any previous wrongdoing). I agree with you in that I would not mind if the forum made account sales illegal.
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What it comes down to is
STOP BUYING ACCOUNTSYou will be tagged, your original account will be tagged, and your other alt accounts will be tagged. It might not all happen the same day but it will eventually happen.
However smart you think you are, you are not as smart as
this guy, and he got caught.