Could you flip your bot and mutate signatures with high s values, to target users with well, "non-compliant" software?
Nice idea.
What about privacy?
And what if someone runs the bot which converts low-S to high-S and my bot do the opposite?
What goal you want to achieve? Do you want to tighten transaction validation rules?
Isn't it better not to confirm txs with high-S by miners?
We have a consensus now. Do you want to change the rules? Are you against the current consensus?