Easy to avoid sending them when you don't have a cell. The Cells and smartphones alone are too expensive to justify, but texts are even worse. So many phone companies charge insane amounts of money to send a minuscule amount of data across their networks because they know they can get away with charging for it.
Even if all that were not true, there are two even bigger reasons I'd not send them;
a) Too damn short. How can you properly articulate something in a mere 160 characters or less? That ridiculous limit to their length is a big reason so many people can't use proper spelling or grammar in written text anymore.
b) Too hard to type. Tiny phone-sized keyboards or even just number keys means typing is a far cry from the 80+ words per minute I'm used to doing, and that makes it a chore. It'd be easier to just call the person (calling people on phones... I know, crazy concept) and finding out what's what quickly and efficiently.
Text'ing was the very reason I cancelled the one cell phone I briefly had. The phone company decided to override the contract and charge me for texts on my plan despite that it was supposed to include 100 free ones a month. Each text was 15 cents - 15 cents for 160 bytes of data! Now... I didn't text, and I had forbidden my friends from bothering me with texts as well, so I didn't think it'd be a problem... until they started texting me daily with Bell ads. Then, they charged me for them. When I asked if they were going to keep charging me for texts from them that I didn't want, they just said "well... yes sir, they're still texts", so I cancelled and never bothered getting a cell again.