Then what could be the possible solution? Just let them do shit?
I don't know the solution

At least there's much less spam than we had years ago, thanks to the Merit system.
And there's this:
The things on the forum which encourage spam are allowed mainly because it's part of the forum's mission to be as free as possible.
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I like to think that I can tell when I'm reading a redundant post [1], and I would completely trust your judgment, and o_e_l_e_o's, Foxpup's, n0nce's, DarkStar_'s, DireWolfM14's, etc. in determining the same.
I'm in the same boat. But in that case, just giving those users Mod-powers would solve it for everyone.
Has spamming ever Paid anyone ??...
Spam wouldn't exist if it wouldn't be profitable.