I'm not sure that your dislike of your own sense of obligation is sufficient cause for a legal prohibition on tipping. I think you should be free to tip (though employers should likewise be free to prohibit employees from accepting tips, and should have fewer reasons not to do so than they currently do.)

OTOH, I would get behind (and meant to include this before) prohibiting employers from taking, offsetting, or redirecting tips, including directing employees in a sharing regime; requiring tips, if given and accepted (employers would be permitted to prohibir the latter as a condition of employment, so long as the policy was uniform) to be property of the recieving employee independent of the employer. Basically, they are now a dodge around sales taxes for many employers, but effectively still revenue that the employer controls, within some limits, which gives employers a big reason to protect tipping culture.