Re: That's a shame
Yes. Like the Free Market sorted out smoking in public places. Oh, it didn't. What happened is a significant minority were happy to share their smoking hobby with those around them, and everyone else had to suck it up (literally), or be seen as the fussy kill-joy who should have stayed at home. It took laws to sort that out.
Texting during performances is much the same. If not enforced, the thoughtless gits will be just fine with telling the rest of us to live with it, or sod off.
A terrible example. Comparing a bystander health-impacting habit to a health impact-free habit of texting is just silly. You don't like people using their phone in a theater. Fine. But if you sit next to someone with their phone out, does you suffer from respiratory issues or suffer a relapse into an unhealthy habit? If so, you may want to seek professional help...